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New Member

Cisco Bug

has anyone seen or heard about the bug listed below? I can't find the documentation anywhere.

Cisco IOS bug ID CSCdp58462



Re: Cisco Bug

The bug was first found in IOS versions 11.2, 12.0 etc, where, a router learning more than 255 neighbors on an interface, would crash the router.

New Member

Re: Cisco Bug

is this in old bug? I'm running 12.2(6c) - has it been resolved in this version?

Re: Cisco Bug

This bug was first resolved starting with 12.1(0.7). Newer IOS versions, usually have bug fixes for the bugs in previous releases, so I believe, in your case, the IOS shouldnt be affected by this bug.

New Member

Re: Cisco Bug

Pls check the bug description listed below and compare your image train with the note. Anyway, you can also contact cisco tac the comfirm the bug.

CSCdp58462 Bug Details

Headline router crashes if Neighbor Count on interface is greater than 255

Product all Model

Component ospf Duplicate of

Severity 3 Status Resolved

First Found-in Version 11.2, 12.0 All affected versions First Fixed-in Version 12.1(0.7), 12.1(0.7)T, 12.1(1)DC, 12.1(1)DB, 12.0(18.3)S, 12.0(18.3)ST Version help

Release Notes

A router can crash if there are *more* than 255 OSPF neighbors learned on any

*one* interface. This was found as part of the internal scalability test,

and there has been no field incidence as it is rare at best to have more than

255 neighbors on any one interface.

Note that OSPF is an IGP, and neighbors are created on a single-hop basis

(unlike BGP). So the risk of being "hacked" to create this problem is low at

best. If the hacker has access to the IGP network segment, this is the least

of the potential problems.

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