Using MLAG in Dell Networking N-Series Switches A Deployment and Configuration Guide for Dell Networking Switches Dell Networking Solutions Engineering September 2016 A Dell EMC Deployment and Configuration Guide
Revisions Date Description Authors September 1.5 added to update VRRP-MLAG section 2016 DNSE: MS February 2016 1.4 added support for Cisco RSTP-PV and QoS, changed formatting. DNSE: AZW, VBT February 2015 1.3 contains full-mesh support with VLT, new method to singlehome devices to one peer, and improvements on “show” reporting from the secondary peer. DNSE: VBT August 2014 1.2 clarifies native VLAN assignment on the peer link; solutions for single-homing a partner device to one peer.
Table of contents Revisions............................................................................................................................................................................. 2 Executive summary............................................................................................................................................................. 5 1 Introduction ....................................................................................................................
10 Connecting single-homed partners ............................................................................................................................57 A B Validation ....................................................................................................................................................................59 A.1 Single-Tier Example .........................................................................................................................................
Executive summary Multi-switch link aggregation (MLAG) is a feature that allows two Dell Networking switches to act as a single switch, providing multiple paths across the network and offering benefits such as: • Failover in cases of defective cables or switches • Double the bandwidth of a single switch • Elimination of port blocking and re-convergence delays of spanning tree Create an MLAG domain by connecting one Dell Networking switch to another through peer link ports.
1 Introduction Dell Networking provides customers with the most efficient modern networking equipment at the lowest cost for data center, campus, and remote networks. Dell servers, storage, and networking products with Dell Solutions and Services enable organizations to achieve unique business goals, improve competitiveness and better serve their customers.
Simple L2 MLAG MLAG domain Primary MLAG peer Secondary MLAG peer Peer Link MLAG MLAG domain appears as a single logical switch to partner switches on the network Partner Switch L3 MLAG with mulitple partner switches MLAG domain Primary MLAG peer Partner Switch Secondary MLAG peer Peer Link MLAG MLAG Two examples of a single-tier MLAG topology 7 Using MLAG in Dell Networking N-Series Switches | version 1.
2 Caveats Following are some of the requirements when implementing MLAGs: • • • • All MLAG peers must be the same switch series. Therefore, all peers of N2000 Series switches are also N2000 Series switches, peers of N3000 Series switches are also N3000 Series switches, and so on. Peer devices must use the same expansion module type if ports from the expansion module are to be part of the MLAG interface. Neither of the two switches used as MLAG peers may be stacked with other switches.
When changing any of the settings listed in Table 1, administrators must modify the settings on both MLAG peer switches. Enable MLAG only after configuring the settings on both peer switches. Dell recommends temporarily disabling MLAG when making changes to these settings. Caution: Failure to make these settings identical on both peers may cause sporadic traffic issues on the network, which can be difficult to troubleshoot.
2.3 MLAG and Firmware Upgrades When upgrading the firmware for switches in an MLAG configuration, refer to the switch’s User’s Guide found at support.dell.com. An upgrade with minimal disruption involves shutting off the MLAG port channels and reloading each peer one at a time. Choose ONE peer should be chosen for the first reload. Complete the following items before reloading. • • • • Disable Dual Control Plane Detection Protocol (DCPDP), if used. Shut down physical ports going to partner switches.
3 Supported Topologies MLAG topologies offer several options. They can be a single layer (one pair of MLAG peer switches) or two layers (two pairs of MLAG peer switches). The peer link can have anywhere from one to eight active interfaces to create the link. With these and other variables, there are dozens of ways to set up an MLAG.
4 Single-Tier MLAG Example Figure 5 shows the configuration of the two MLAG peers with two MLAG partners using the default Spanning Tree Protocol configuration. MLAG Domain 1 Peer Link N3048-1 MLAG N3048-3 N3048-2 MLAG N3048-4 Single-tier MLAG topology 12 Using MLAG in Dell Networking N-Series Switches | version 1.
4.1 Physical Connectivity After completion of the configuration, physical connectivity between all four switches can be established. Table 3 serves as a guide for cabling the switches. Physical Connectivity Dell Networking N3048 4.
Identify and configure the peer link interface -peer link requires a native VLAN (i.e. VLAN 1 or other VLAN made native) Identify and configure the peer link interface -peer link requires a native VLAN (i.e.
configure feature vpc vpc domain 1 peer-keepalive enable end configure feature vpc vpc domain 1 peer-keepalive enable end MLAG configuration for N3048-1 and N3048-2 N3048-3 N3048-4 Create same VLAN on partners. Create same VLAN on partners. configure vlan 30 end configure vlan 30 end Configure the port channel trunk for the partner link. Configure the port channel trunk for the partner link.
5 Two-Tier MLAG Example Figure 8 shows a logical topology for a two-tier, fully meshed MLAG offering full redundancy across all four MLAG peers. The example uses six Dell N3024 switches, however the same principles and commands apply to the N2000 and N4000 series switches. N3024-1 MLAG Domain 1 N3024-2 N3024-3 MLAG Domain 2 N3024-4 N3024-5 N3024-6 Two-tier MLAG example topology 16 Using MLAG in Dell Networking N-Series Switches | version 1.
5.1 Physical Connectivity After completion of the configuration, physical connectivity between all six switches can be established. Table 4 serves as a guide for cabling the switches. Physical Connectivity Dell Networking N3024 5.
configure interface port-channel 1 description MLAG_peer_link switchport mode trunk vpc peer link end configure interface port-channel 1 description MLAG_peer_link switchport mode trunk vpc peer link end Identify and configure the peer link interface -peer link requires a native VLAN (i.e. VLAN 1 or other VLAN made native). Identify and configure the peer link interface -peer link requires a native VLAN (i.e. VLAN 1 or other VLAN made native).
configure interface gigabitethernet 1/0/2 channel-group 40 mode active description MLAG_Partner_link end configure interface gigabitethernet 1/0/2 channel-group 40 mode active description MLAG_Partner_link end Assign interfaces to port channel that will connect to partner 1’s LAG -put port 14 into LAG 50. Assign interfaces to port channel that will connect to partner 1’s LAG -put port 13 into LAG 50.
configure interface tengigabitethernet 1/0/1 channel-group 1 mode active description MLAG_peer_link end configure interface tengigabitethernet 1/0/1 channel-group 1 mode active description MLAG_peer_link end Create a LAG for partner switches 2-3 to pass traffic. Assign a unique id for partner. Create a LAG for partner switches 2-3 to pass traffic. Assign a unique id for partner.
configure interface gigabitethernet 1/0/14 channel-group 60 mode active switchport mode trunk switchport trunk allowed vlan 30 end configure interface gigabitethernet 1/0/13 channel-group 60 mode active switchport mode trunk switchport trunk allowed vlan 30 end Enable the MLAG. Enable the MLAG.
6 MLAG, vPC, and RSTP-PV Example MLAG can be used in combination with Cisco’s Virtual Port Channel (vPC) technology. vPC is a technology very similar to MLAG that is proprietary to Cisco products, such as Cisco Nexus switches. MLAG is compatible with Rapid Spanning Tree Protocol per VLAN (RSTP-PV), which is fully compatible with Cisco’s Spanning Tree Protocol.
6.1 Physical Connectivity After completion of the configuration, physical connectivity between all eight switches can be established. Table 5 serves as a guide for cabling the switches.
6.2 Initial Setup and RSTP-PV Configuration This section deals with setting up the switches for initial configuration and RSTP-PV. N2024-1 Configure host name. Create VLAN 999 for management. Configure gi1/0/1 for Access mode VLAN 999. Configure the IP for management. Configure the default route for management. Configure a user name and password. configure hostname N2024-1 vlan 999 exit interface gi1/0/1 switchport access vlan 999 interface vlan 999 ip address 172.25.188.75 255.255.0.
N4032F-1 Enable MLAG feature. Enable MLAG feature. configure feature vpc end configure feature vpc end Configure host name. Configure the IP and default route for management. Configure a user name and password. Configure host name. Configure the IP and default route for management. Configure a user name and password. configure hostname N4032F-1 interface out-of-band ip address 172.25.188.71 255.255.0.0 172.25.188.
N3024P-1 N3024P-2 Configure host name. Configure the IP and default route for management. Configure a user name and password. Configure host name. Configure the IP and default route for management. Configure a user name and password. configure hostname N3024P-1 interface out-of-band ip address 172.25.188.73 255.255.0.0 172.25.188.254 exit username admin password Dell1234 privilege 15 end configure hostname N3024P-2 interface out-of-band ip address 172.25.188.74 255.255.0.0 172.25.188.
Note: See appendix B for the corresponding Cisco vPC configuration for this example environment. N4032F-1 27 N4032F-2 Create an MLAG domain. Assign role priority. Assign the keepalive management IP address of N4032F-2. Create an MLAG domain. Assign role priority. Assign the keepalive management IP address of N4032F-1. configure vpc domain 55 role priority 1 peer-keepalive enable peer-keepalive destination 172.25.188.72 source 172.25.188.
Assign interfaces to the port channel and enable LACP. Assign interfaces to the port channel and enable LACP. configure interface range te1/0/1-2 description te1/0/12_to_Nexus_5548_vPC_peers switchport mode trunk channel-group 100 mode active end configure interface range te1/0/1-2 description te1/0/12_to_Nexus_5548_vPC_peers switchport mode trunk channel-group 100 mode active end Configure the MLAG going to the Nexus 5672UP switch. Create the port channel.
configure interface te1/0/4 description te1/0/4_to_N3024P-1 switchport mode trunk channel-group 20 mode active end Configure the MLAG going to the N3024P-2 switch. Create the port channel. Configure the port channel for dot1q trunking. Specify the MLAG ID. configure interface port-channel 30 description MLAG_to_N3024P-2 switchport mode trunk vpc 30 end Assign interfaces to the port channel and enable LACP.
7 MLAG and VRRP Example The following example scenario combines two-tier MLAG and Virtual Router Redundancy Protocol (VRRP). Two N4032 and two N2048 switches in an MLAG configuration provide robust and high-capacity, Layer-2 transport to an access layer, N1532 switch. The N4032 switches acting aggregation/core layer provide gateway redundancy using VRRP on MLAG interfaces. With VRRP configured, the two switches share a common virtual IP, which is used as the gateway address for clients on the network.
MLAG and VRRP example topology 31 Using MLAG in Dell Networking N-Series Switches | version 1.
7.1 Physical Connectivity After completion of the configuration, all six switches can be physically interconnected. Table 6 serves as a guide for cabling the switches.
7.2 Initial Setup and MSTP Configuration This section deals with setting up the switches for initial configuration and MSTP. N4032-1 Configure host name. Configure the IP and default route for management. Configure a user name and password. N4032-2 Configure host name. Configure the IP and default route for management. Configure a user name and password. configure hostname N4032-1 interface out-of-band ip address 172.25.188.71 255.255.0.0 172.25.188.
N2048-1 Configure host name. Configure the IP and default route for management. Configure a user name and password. Enable MLAG feature. Configure host name. Configure the IP and default route for management. Configure a user name and password. Enable MLAG feature. configure hostname N2048-1 interface out-of-band ip address 172.25.188.73 255.255.0.0 172.25.188.254 exit username admin password Dell1234 privilege 15 feature vpc end configure hostname N2048-2 interface out-of-band ip address 172.25.188.
N1524P-1 Configure host name. Create VLAN 999 for management. Configure gi1/0/1 for Access mode VLAN 999. Configure the IP for management. Configure the default route for management. Configure a user name and password. configure hostname N1548-1 vlan 999 exit interface gi1/0/1 switchport access vlan 999 interface vlan 999 ip address 172.25.188.77 255.255.0.0 exit ip default-gateway 172.25.188.254 username admin password Dell1234 privilege 15 end Configure MSTP. Configure VLAN 10, 20.
7.3 Configuring VRRP This section deals with setting up the switches for VRRP. N4032-1 N4032-2 Enable routing. Enable routing. configure ip routing end configure ip routing end Enable VRRP globally. Create VRRP instance for VLAN 10. Set virtual IP address. Give the VRRP instance a higher priority. Enable VRRP on the interface. Enable VRRP globally. Create VRRP instance for VLAN 10. Set virtual IP address. Enable VRRP on the interface.
7.4 Configuring MLAG This section deals with setting up the switches for MLAG. 37 N4032-1 Create an MLAG domain. Assign role priority. Assign the keepalive management IP address of N4032P-2. configure vpc domain 55 role priority 1 peer-keepalive enable peer-keepalive destination 172.25.188.72 source 172.25.188.71 peer detection enable end Create a port channel. Give the port channel a description. Configure the port channel for dot1q trunking. Assign as an MLAG peer link. N4032-2 Create an MLAG domain.
Assign interface to the port channel and enable LACP. Assign interface to the port channel and enable LACP. configure interface te1/0/1-2 description MLAG_to_N2048_switches channel-group 11 mode active end configure interface te1/0/1-2 description MLAG_to_N2048_switches channel-group 11 mode active end MLAG configuration on N4032-1 and N4032-2 N2048-1 38 N2048-2 Create an MLAG domain. Assign role priority. Assign the keepalive management IP address of N2048P-2. Create an MLAG domain.
Configure one MLAG going to the N4032 switches. Create the port channel. Give the port channel a description. Configure the port channel for dot1q trunking VLAN 10. Specify the MLAG ID. Configure one MLAG going to the N4032 switches. Create the port channel. Give the port channel a description. Configure the port channel for do1q trunking VLAN 10. Specify the MLAG ID.
N1524P-1 Configure the port channel connecting to the upstream MLAG peer switches. configure interface port-channel 13 description gi1/0/1314_to_N2048_MLAG_Peers switchport access vlan 10 interface range gi1/0/13-14 description te1/0/1314_to_N2048_MLAG_Peers channel-group 13 mode active end Configure the port channel connecting to the upstream MLAG peer switches.
8 VoIP and MLAG Example MLAG is compatible with Voice VLAN and QoS for VoIP deployments. The following example provides instruction on setting up MLAG, RSTP-PV, and Voice VLAN, as well as configuring QoS for voice traffic prioritization. This allows for the combination of a highly robust, non-blocking architecture provided by MLAG with the fast-converging loop mitigation provided by RSTP-PV with the assurance of stutter-free voice traffic should the network encounter contention.
8.1 Physical Connectivity After completion of the configuration, physical connectivity between all five switches can be established. Table 7 serves as a guide for cabling the switches. Physical Connectivity Dell Networking N4032F 8.
Configure RSTP-PV. Configure VLANs 10, 20, 30, 100, and 200. Configure RSTP-PV. Configure VLANs 10, 20, 30, 100, and 200.
configure spanning-tree mode rapid-pvst vlan 10 name Marketing exit vlan 20 name HR exit vlan 30 name Operations exit vlan 100 name Voice exit vlan 200 name Data end configure spanning-tree mode rapid-pvst vlan 10 name Marketing exit vlan 20 name HR exit vlan 30 name Operations exit vlan 100 name Voice exit vlan 200 name Data end Initial setup for N3024P-1 and N3024P-2 Note: See appendix section B.2.1 for the corresponding Cisco initial configuration for this example environment. 8.
Assign interfaces to the port channel and enable LACP. Assign interfaces to the port channel and enable LACP. configure interface range fo1/1/1-2 description MLAG_Peer_Link switchport mode trunk channel-group 55 mode active end configure interface range fo1/1/1-2 description MLAG_Peer_Link switchport mode trunk channel-group 55 mode active end Configure the MLAG going to the Nexus 5672UP switch. Create the port channel. Configure the port channel for dot1q trunking. Specify the MLAG ID.
configure interface te1/0/4 description te1/0/4_to_Nexus_N3024P-1 switchport mode trunk channel-group 20 mode active end Configure the MLAG going to the N3024P-2 switch. Create the port channel. Configure the port channel for dot1q trunking. Specify the MLAG ID. configure interface port-channel 30 description MLAG_to_N3024P-2 switchport mode trunk vpc 30 end Assign interfaces to the port channel and enable LACP.
8.4 QoS for VoIP Configuration This section deals with configuring the switches for Voice VLAN and QoS on the N-Series switches. Information on how to set up the Cisco UCS can be found in the QoS for VOIP on Dell N-Series and W-Series (v2.0) deployment guide. N4032F-1 N4032F-2 Globally enable Voice VLAN. Trust incoming DSCP markings. Map DSCP markings 24 and 46 to queue 5. Set queue 5 to strict priority scheduling. Globally enable Voice VLAN. Trust incoming DSCP markings.
configure interface gigabit 1/0/1 switchport access vlan 100 voice vlan 100 voice vlan auth disable interface range gigabit 1/0/2-24 switchport mode general switchport general pvid 200 switchport general allow vlan add 100 tagged switchport general allow vlan add 200 voice vlan 100 voice vlan auth disable exit configure interface range gigabit 1/0/1-24 switchport mode general switchport general pvid 200 switchport general allow vlan add 100 tagged switchport general allow vlan add 200 voice vlan 100 voice
9 MLAG with VLT Example MLAG also works with Virtual Link Trunking (VLT). VLT is a technology similar to MLAG that can be used on certain Dell switches like the S4810. Figure 12 shows VLT peers on one layer and MLAG peers on the second layer with a full-mesh LAG. The LAG connecting the two S4810 switches is the VLTi (VLT interconnect) for the VLT domain. The bottom LAG between the two N4032F switches is the peer link for the MLAG domain. The top and bottom partner switches may be any switch model.
This topology in Figure 34 is similar to the one shown in Figure 8 on page 16. The former topology replaces N3024-2 and N3024-3 switches with S4810s, and N3024-4 and N3024-5 switches with N4032s to illustrate compatibility of VLT with MLAG protocols. This particular scenario also provides a full-mesh 10 GbE solution. The VLTi and peer link connections use 40 GbE interfaces. Notes: 1.
9.2 Configuring MLAG, VLT, and Port Channels This section deals with setting up the switches for MLAG, VLT, and LACP port channels. S4810-1 51 S4810-2 Enable Spanning Tree Protocol, which is disabled by default on the S4810. Enable Spanning Tree Protocol, which is disabled by default on the S4810. configure protocol spanning-tree rstp no disable end configure protocol spanning-tree rstp no disable end Create one or more VLANs for partner traffic. Create one or more VLANs for partner traffic.
config vlt domain 1 peer link port-channel 1 back-up destination 172.25.194.24 primary-priority 1 system-mac mac-address aa:bb:cc:dd:12:34 unit-id 0 end config vlt domain 1 peer link port-channel 1 back-up destination 172.25.194.25 primary-priority 2 system-mac mac-address aa:bb:cc:dd:12:34 unit-id 1 end Create a LAG for partner switches 4 and 5. - put into L2 mode - set rate interval - port channel of peer (same here for ease of remembering) Create a LAG for partner switch switches 4 and 5.
Create a LAG for partner switch 1 to pass traffic. - put into L2 mode - set rate interval - port channel of peer (same here for ease of remembering) Create a LAG for partner switch 1 to pass traffic.
N4032F-1 N4032F-2 Create a VLAN for MLAG and all partner traffic. Create a VLAN for MLAG and all partner traffic. configure vlan 30 end configure vlan 30 end Configure the port channel for the peer link - must be trunk mode. Configure the port channel for the peer link - must be trunk mode.
Create a LAG for partner switch 5 to pass traffic. Assign a unique id for partner switch 5. Create a LAG for partner switch 5 to pass traffic. Assign a unique id for partner switch 5. configure interface port-channel 60 switchport mode trunk vpc 60 end configure interface port-channel 60 switchport mode trunk vpc 60 end Assign interfaces to VLAN that will connect to partner 5’s LAG - put both into same LAG 60. Assign interfaces to VLAN that will connect to partner 5’s LAG - put both into same LAG 60.
N3024-1 N3024-2 Create same VLAN on partners. Create same VLAN on partners. configure vlan 30 end configure vlan 30 end Configure the port channel trunks for the partner links. Configure the port channel trunks for the partner links. configure interface port-channel 1 switchport mode trunk end configure interface port-channel 1 switchport mode trunk end Assign first interface to LAG (channel-group). Assign first interface to LAG (channel-group).
10 Connecting single-homed partners By single-homing a device (attaching it to only one peer) does not actually create an MLAG partner. When configuring an MLAG topology, partner devices (switches, servers, storage, or other) must use an MLAG link aggregation that spans both MLAG peers in order to be a partner. Using only one cable or port-channel going into only one of the MLAG peers (Figure 38) does not take advantage of the multiple path MLAG and can lead to data loss.
MLAG interfaces and non-redundant ports cannot be members of the same VLAN. That is, a VLAN may contain MLAG interfaces or a VLAN may contain non-redundant ports, but not both. Note: Solution 1 can run in an MSTP or RSTP-PV environment. Remove STP from the extra link to keep the peer link unblocked. Solution 2 The second solution, as shown in Figure 40, is to configure one or more MLAG partner switches between the MLAG peers and the devices that require a single link.
A Validation A.1 Single-Tier Example Run the show vpc brief command on either MLAG peer to display all information for both peers. MLAG peer 1 (N3048-1) MLAG peer 2 (N3048-2) show vpc brief show vpc brief VPC domain ID.................................... 1 VPC admin status............................... Enabled Keep-alive admin status................... Enabled VPC operational status..................... Enabled Self role................................................ Primary Peer role...............
Local Members Status ----------------Gi1/0/48 ------ Up Peer Members ---------------Gi1/0/12 Status -----Up Local Members ----------------Gi1/0/12 Status -----Up Peer Members ---------------Gi1/0/48 Status -----Up show vpc brief command output for N3048 MLAG peers in Single-tier topology Results of the command should be the same as shown above. All member ports must show UP, and the VPC interface state must show Active.
MLAG peer 1 (N3024-2) MLAG peer 2 (N3024-3) show vpc brief VPC domain ID...................................... 1 VPC admin status............................... Enabled Keep-alive admin status................... Enabled VPC operational status..................... Enabled Self role................................................ Primary Peer role.............................................. Secondary Peer detection admin status........... Disabled Operational VPC MAC...................... ECF4.BBF6.
All member ports must show UP, and the VPC interface state must show Active. The show interface port-channel is another helpful tool to let you know if the configured LAGs are up and running. When correctly configured, ports in the LAG are listed with an Active status. Inactive ports indicate a possible cabling or configuration issue.
-------------------------------------------------------------------id Port Status Active vlans -- ---- ------ ------------------------------------------------1 Po55 up 1,10,20,30,100,200 -------------------------------------------------------------------id Port Status Active vlans -- ---- ------ ------------------------------------------------1 Po55 up 1,10,20,30,100,200 vPC status --------------------------------------------------------------------------id Port Status Consistency Reason Active vlans ----
Number of VPCs operational..................... 4 Number of VPCs operational..................... 4 VPC id# 10 ----------Interface...................................... Po10 Configured VLANs............................... 1,10,20,30,100,200 VPC interface state............................ Active VPC id# 10 ----------Interface...................................... Po10 Configured VLANs............................... 1,10,20,30,100,200 VPC interface state............................
----------------- -----Te1/0/1 Up Te1/0/2 Up ----------------- -----Te1/0/1 Up Te1/0/2 Up Peer Members Status ---------------- -----Te1/0/1 Up Te1/0/2 Up Peer Members Status ---------------- -----Te1/0/1 Up Te1/0/2 Up show vpc brief command output for N4032F MLAG peers in MLAG, vPC, and RSTPPV topology 65 Using MLAG in Dell Networking N-Series Switches | version 1.
A.4 MLAG and VRRP Example Run the show vrrp command on either VRRP peer to display all information for both peers. MLAG peer 1 (N4032-1) MLAG peer 2 (N4032-2) show vrrp show vrrp Admin Mode..................................... Enable Router Checksum Errors......................... 0 Router Version Errors.......................... 0 Router VRID Errors............................. 0 Vlan 10 - Group 10 Primary IP Address............................. 192.168.10.1 VMAC Address...............................
Run the show vpc brief command on either MLAG peer to display all information for both peers. 67 MLAG peer 1 (N4032-1) MLAG peer 2 (N4032-2) show vpc brief show vpc brief VPC Domain ID.................................. 55 VPC admin status............................... Enabled Keep-alive admin status........................ Enabled VPC operational status......................... Enabled Self role...................................... Primary Peer role......................................
Peer Members ---------------Gi1/0/1 Status -----Up Peer Members ---------------Gi1/0/2 Status -----Up VPC id# 55 ----------Interface...................................... Po55 Configured VLANs............................... 10,20 VPC interface state............................ Active VPC id# 55 ----------Interface...................................... Po55 Configured VLANs............................... 10,20 VPC interface state............................
A.5 VoIP and MLAG Example Run the show vpc brief command on either MLAG peer to display all information for both peers. 69 MLAG peer 1 (N4032F-1) MLAG peer 2 (N4032F-2) show vpc brief show vpc brief VPC Domain ID.................................. 55 VPC admin status............................... Enabled Keep-alive admin status........................ Enabled VPC operational status......................... Enabled Self role...................................... Primary Peer role......................
Configured VLANs............................... 1,10,20,30,100,200 VPC interface state............................ Active Configured VLANs............................... 1,10,20,30,100,200 VPC interface state............................ Active Local Members Status ----------------- -----Te1/0/4 Up Local Members Status ----------------- -----Te1/0/4 Up Peer Members Status ---------------- -----Te1/0/4 Up Peer Members Status ---------------- -----Te1/0/4 Up VPC id# 30 ----------Interface................
MLAG partner (N3024P-1) MLAG partner (N3024P-2) show classofservice ip-dscp-mapping show voice vlan IP DSCP Traffic Class ------------- ------------0(be/cs0) 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8(cs1) 0 9 0 10(af11) 0 11 0 12(af12) 0 13 0 14(af13) 0 15 0 16(cs2) 0 17 0 18(af21) 0 19 0 20(af22) 0 21 0 22(af23) 0 23 0 24(cs3) 5 25 1 26(af31) 1 27 1 28(af32) 1 29 1 30(af33) 1 31 1 32(cs4) 2 33 2 34(af41) 2 35 2 36(af42) 2 37 2 38(af43) 2 39 2 40(cs5) 2 41 2 42 2 43 2 44 2 45 2 46(ef) 5 Administrative Mode......
A.6 MLAG and VLT Example Run the show vpc brief command on one of the MLAG peers to display information for the MLAG peers. Notes: 1. Interfaces used to connect each peer to the partner switch LAG are not required to match on each peer. For instance, in the example above, one partner LAG interface connects to 1/0/47 on the primary peer while the other interface connects to 1/0/11 on the secondary peer. The peers can use different ports 2.
Te1/0/1 Te1/0/2 Up Up Te1/0/1 Te1/0/2 Up Up VPC id# 60 ----------Interface................................................ Po60 Configured VLANs............................... 1,30 VPC interface state............................. Active VPC id# 60 ----------Interface................................................ Po60 Configured VLANs............................... 1,30 VPC interface state.............................
VLT peer 1 (S4810-1) VLT peer 2 ( S4810-2) show vlt brief show vlt brief VLT Domain Brief -----------------Domain ID: 1 Role: Primary Role Priority: 1 ICL Link Status: Up HeartBeat Status: Up VLT peer Status: Up Local Unit Id: 0 Version: 6(4) Local System MAC address: 00:01:e8:8b:36:0e Remote System MAC address: 00:01:e8:8b:3b:6f Configured System MAC address: aa:bb:cc:dd:12:34 Remote system version: 6(4) Delay-Restore timer: 90 seconds Delay-Restore Abort Threshold: 60 seconds Peer-Routing : Disabled P
----------------Destination: peer HeartBeat status: Destination VRF: HeartBeat Timer Interval: HeartBeat Timeout: UDP Port: HeartBeat Messages Sent: HeartBeat Messages Received: 172.25.194.24 Up default 1 3 34998 257900 257868 ----------------Destination: peer HeartBeat status: Destination VRF: HeartBeat Timer Interval: HeartBeat Timeout: UDP Port: HeartBeat Messages Sent: HeartBeat Messages Received: 172.25.194.
B Cisco Configurations B.1 B.1.1 MLAG, vPC, and RSTP-PV Example Initial Setup and RSTP-PV Configuration Nexus_5548UP-1 Nexus_5548UP-2 Enable the required features for vPC. Enable the LLDP, Telnet, LACP, and vPC features. Enable the required features for vPC. Enable the LLDP, Telnet, LACP, and vPC features. config feature feature feature feature end config feature feature feature feature end telnet lldp lacp vpc telnet lldp lacp vpc Configure the host name. Configure the IP for management.
Nexus_5672UP-1 Enable the required features and management interface for vPC. Enable the Telnet, LLDP and LACP features. config feature telnet feature lldp feature lacp end Configure the host name. Configure the IP for management. Configure the default route for management. Configure a user name and password. configure hostname Nexus_5672UP-1 interface mgmt 0 ip address 172.25.188.61 255.255.0.0 exit vrf context management ip route 0.0.0.0/0 172.25.188.
B.1.2 Configuring MLAG and vPC Nexus_5548UP-1 78 Nexus_5548UP-2 Create a vPC domain. Assign role priority. Assign the keepalive management IP address of Nexus_5548UP-2. Create a vPC domain. Assign role priority. Assign the keepalive management IP address of Nexus_5548UP-1. configure vpc domain 1 role priority 1 peer-keepalive destination 172.25.188.60 end configure vpc domain 1 role priority 65535 peer-keepalive destination 172.25.189.
Assign interfaces to the port channel and enable LACP. Assign interfaces to the port channel and enable LACP. configure interface ethernet 1/21-22 description eth1/21-22 to N4032F MLAG Peers switchport mode trunk channel-group 100 mode active end configure interface ethernet 1/21-22 description eth1/21-22 to N4032F MLAG Peers switchport mode trunk channel-group 100 mode active end Configure the vPC going to the N2024-1. Create the port channel. Configure the port channel for dot1q trunking.
B.2 B.2.1 VoIP and MLAG Examples Initial Setup and RSTP-PV Configuration Nexus_5672UP-1 Enable the required features and management interface for vPC. Enable the Telnet, LLDP and LACP features. config feature telnet feature lldp feature lacp end Configure the host name. Configure the IP for management. Configure the default route for management. Configure a user name and password. configure hostname Nexus_5548UP-1 interface mgmt 0 ip address 172.25.189.60 255.255.0.0 exit vrf context management ip route 0.
B.2.2 Configuring MLAG and Port Channels Nexus_5672UP-1 Configure the port channel connecting to the upstream MLAG peer switches. configure interface port-channel 10 description Po10_to N4032F_MLAG Peers switchport mode trunk end Assign interfaces to the port channel and enable LACP.
C Component Information This paper was compiled using the following components and versions. Component information Component Revision Dell N2000, N3000, N4000 6.3.0.0 Dell S4810 Dell Application Software (Firmware) Version 9.6 Cisco Nexus 5548UP 7.2.0.N1.1 Cisco Nexus 5672UP 7.1.2.N1.1 Cables SFP+ Optical Transceivers (SR) with Fiber Cables Five meter cables VoIP equipment Cisco UCS C-Series Server C220 Cisco Unified CM 10.
D Additional Resources Support.dell.com is focused on meeting your needs with proven services and support. DellTechCenter.com is an IT Community where you can connect with Dell Customers and Dell employees for the purpose of sharing knowledge, best practices, and information about Dell products and installations. Referenced or recommended Dell publications: 83 • Dell Networking Support - http://www.dell.
E Unsupported Configurations The configurations and topologies found in this guide are supported. This appendix discusses a few unsupported configuration models. Different types of expansion modules in a peer link are unsupported. Peer devices must use the same type of expansion module if ports from the expansion modules are to be part of the MLAG interface. Stacking of either MLAG peer is unsupported. Neither switch used as an MLAG peer may be stacked with other switches.
F Terminology DSCP: Distributed Services Code Point is a field in the header of IPv4 and IPv6 packets which usually finds its use in Quality of Service. LACP (Link Aggregation Control Protocol): LACP is used to control the bundling (aggregating) of several physical ports together to form a single logical channel. LACP allows a network device to negotiate an automatic bundling of links by sending LACP packets to the peer (which is a directly connected device that also implements LACP).
Voice VLAN: Voice VLAN is a feature that enables switch ports to carry voice traffic with an administratordefined priority so as to enable prioritization of voice traffic over data traffic. VoIP: Voice over Internet Protocol is a set of methodologies for the delivery of voice communications over Internet Protocol.
Support and Feedback Contacting Technical Support Support Contact Information Web: http://Support.Dell.com/ Telephone: USA: 1-800-945-3355 Feedback for this document We encourage readers of this publication to provide feedback on the quality and usefulness of this deployment guide by sending an email to: DELL_NETWORKING_SOLUTIONS@dell.
