Руководство По Устранению Ошибки для Cisco Cisco Compression Service Adapter for Cisco 7000 Series Routers

The L3 module can be configured to automatically download the configuration file from a TFTP server when
you issue the service config command. Store the configuration files on a TFTP server and download them
while booting. This is useful when the size of the configuration file is larger than the size of the NVRAM on
the device.

When the L3 module is configured with the service config command, it generates TFTP requests to download
its configuration from a TFTP server.

In a scenario where an IPS/IDS is used, you might observe that the router continuously sends tftp broadcast.
This is confirmed by the IP address of the source and the destination is 255.255.255.255, traffic is UDP 69
(TFTP).

In order to stop the log messages from being generated, issue these commands:

Router#config terminal

Router(config)#no service config

Router(config)#exit

Router#copy running−config startup−config

Remember these key points when you configure the routing module on the Catalyst 4500/4000:

The gigabit interfaces that you see on the front panel are not the same as the gigabit interfaces that
you see when you issue the show port command from the Supervisor Engine. The interfaces on the
front panel are the interfaces with the names gigabit 1 and gigabit 2 on the router.

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Make sure that the native VLAN of the trunks between the switch and the router is a dummy VLAN.
The CPU routes in software all traffic that is on the native VLAN. Therefore, create one additional
VLAN that you do not use elsewhere and make that VLAN the native VLAN on the links between the
switch and router.

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Updated: Jan 07, 2007

Document ID: 6198