Avaya Troubleshooting Routers Instrukcja Naprawy Pobierz pdf (Strona 123)

Troubleshooting a Network Layer Problem

308656-14.00 Rev 00

6-13

Figure 6-1. Comparing the Endstation and Router Configurations

The router uses the subnet mask to determine which traffic to route to each

segment. In Figure 6-1

, the router’s subnet mask must include the third octet if

other subnets in the 129.122 network connect to the router. In such

configurations, you typically configure Proxy ARP to run on the router’s

interface because the endstation does not know that it has to go through the

router to get to other subnets of the 129.122.0.0 network.

Disable IP on the router’s interface, then try to ping the IP address of the

router again.

If the ping succeeds, a device with a duplicate IP address is on the segment.

Enable IP on the router’s interface and try to ping other stations on the

segment that is reporting problems.

If the attempts to ping fail, verify that you configured the router with the

correct IP network, interface, and subnet addresses.

Host

Router

etwor

129

122

Interface 129.122.32.1

Subnet mask 255.255.255.0

Network 129.122.0.0

Interface 129.122.32.66

Subnet mask 255.255.0.0

TRB0006A

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Avaya Troubleshooting Routers Instrukcja Naprawy Strona 123