Avaya Troubleshooting Routers Guia de Resolução de Problemas descarregar pdf (Página 116)

Troubleshooting Routers

6-10

Router Cannot Ping Another Local Device

When the router cannot ping another device on the network, it does not

necessarily mean that the network or router is down.

If the device you are trying to ping never responded successfully to a ping request

before because it is a new endstation, a new segment, or a new router, make sure

that you conﬁgured it properly.

If the ping was successful at one time, and is no longer successful, try to isolate

the problem to any recent changes in the network. If you do not know of any

recent changes, or if you veriﬁed that they are OK, do the following:

1. Try to make the endstation ping itself.

If the endstation cannot ping itself, refer to the manuals on the TCP/IP stack

and LAN card for that system and inspect the installation and conﬁguration.

An endstation must be able to ping itself in order to receive a ping response

from the network. However, the self-ping operation is internal, and has

nothing to do with the network or the router. Therefore, an incorrectly

conﬁgured endstation may be able to ping itself just as easily as a correctly

conﬁgured endstation.

2. Try to make the router ping its own interface.

If the router can ping its own interface, it enabled the interface and the

protocols conﬁgured on the port. However, like an endstation, a

misconﬁgured router may be able to ping itself.

If the router cannot ping its own interface, check the log and verify the

physical status of the interface.

3. Try to make the endstation ping other interfaces on the same router.

4. Try to make the endstation ping other devices on the same segment.

5. Enter the Technician Interface loadmap

<slot_no.>

command for each

slot and verify that IP and ARP are running on all slots.

6. Verify that the ARP cache only has entries for hosts on the local network.

Refer to the MIB object wfIpNetToMediaEntry to locate the ARP cache.

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