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Cisco Bug: CSCte39250 - Router crashes @ ipv6_show_interface

Last Modified

Feb 04, 2017

Products (1)

  • Cisco IOS

Known Affected Releases

12.2(32.8.11)SX341 12.4(15)T12

Description (partial)

Symptoms: Router crashes at ipv6_show_interface while executing the 
<CmdBold>show ipv6 interface brief<noCmdBold> command after a link-local has 
been explicitly configured, and an invalid deletion command has been executed 
to remove it. In all other scenarios the <CmdBold>show ipv6 interface 
brief<noCmdBold> command has no issues.

Conditions: This symptom only happens on a Cisco 7200 router that is running 
Cisco IOS Release 12.4(15)T12. The steps to follow are: 
- Configure explicitly a link-local address on an interface:

ipv6 address FE80::A8BB:CCFF:FE03:2001 link-local 

- Try to remove a non-existent and invalid address which has the same prefix 
as the previously configured link-local address:

no ipv6 address FE80::A8BB:CCFF:FE03:2001/64

- Try to display the addresses on that interface:

do <CmdBold>show ipv6 interface<noCmdBold> command
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Bug Details Include

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