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Ghost Interfaces on a 6509

cari.net
Level 1
Level 1

I recently removed a blade of 48 fast ethernet ports from a 6509 switch running IOS 12.1(23)E1. I thought this would remove these ports from the running configuration, but it hasn't.

When I do a show modules I see slot 5 as empty. But I can still go into interface configuration mode and configure any of the interfaces as before, such as fastethernet5/1 through fastethernet5/48. When I do a show interface fastethernet5/x I see this:

FastEthernet5/2 is administratively down, line protocol is down (disabled)

Hardware has been removed

Hardware is C6k 100Mb 802.3, address is 00b0.c2f0.c589 (bia 0001.9709.0c21)

It mentions the hardware has been removed for all ports except fa5/1 and fa5/47. For some strange reason it still thinks ports 5/1 and 5/47 are physically present?

How can I force the switch to remove these 48 ports from its configuration? These ports are being assigned snmp index numbers which are doing strange things to my mrtg graphs.

Thanks in advance.

1 Reply 1

Prashanth Krishnappa
Cisco Employee
Cisco Employee

This is expected.. Take a look at

http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCed83035

To remedy this, a CLI knob was added that will permanently remove the config when the linecard is pulled out was added.

"module clear-config" is new CLI added for this feature. When it is set, and you pull out any LC (not supervisor card) the port configuration for these linecards will be cleared.

router(config)#module ?

ContentServicesGateway Configure a CSG module

ContentSwitchingModule configure a CSM SLB module

clear-config To clear configuration when module is removed

provision Configure module provision status

To disable this feature, enter the command:

"no module clear-config"

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