ECS4110-28P_Management Guide

C HAPTER 18 | General IP Routing
Configuring IP Routing Interfaces
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◆ A trace terminates when the destination responds, when the maximum
timeout (TTL) is exceeded, or the maximum number of hops is
exceeded.
◆ The trace route function first sends probe datagrams with the TTL value
set at one. This causes the first router to discard the datagram and
return an error message. The trace function then sends several probe
messages at each subsequent TTL level and displays the round-trip
time for each message. Not all devices respond correctly to probes by
returning an “ICMP port unreachable” message. If the timer goes off
before a response is returned, the trace function prints a series of
asterisks and the “Request Timed Out” message. A long sequence of
these messages, terminating only when the maximum timeout has
been reached, may indicate this problem with the target device.
◆ The same link-local address may be used by different interfaces/nodes
in different zones (RFC 4007). Therefore, when specifying a link-local
address, include zone-id information indicating the VLAN identifier after
the % delimiter. For example, FE80::7272%1 identifies VLAN 1 as the
interface from which the trace route is sent.
WEB INTERFACE
To trace the route to another device on the network:
1. Click IP, General, Trace Route.
2. Specify the target device.
3. Click Apply.
Figure 410: Tracing the Route to a Network Device