[c-nsp] Weird OSPF meltdown

[Rodney Dunn]

On Fri, Sep 19, 2008 at 02:45:48AM -0300, Rubens Kuhl Jr. wrote:
> Every once in a while one of ME6524 routers starts getting hammered by
> one customer or the other... the symptom is that all adjacencies go
> down and stay stuck at EXCHANGE phase.

hammered by what?

> CPU doesn't go up, and CoPP is applied; OSPF is authenticated on every
> adjacency (which are all point-to-point on SVIs), and we don't see any
> strange neighbors.

Why are the neighbors going down? Hold time expired? If so you have to figure
out why those frames are dropped.

> 
> It occurs more often with Internet access static connected route
> customers, but has now happened on a VRF as well.
> 
> The only solution is disconnecting the customer; provisioning the
> customer on SVI or on routerport doesn't seem to have any effect.

Is it OSPF going down on an interface other than where this "hammering"
is coming from? I'm assuming you mean it's a flood of traffic.

> 
> IOS is 12.2(18)ZU2; Sham-Link on this IOS is vulnerable but we are not
> using it.
> 
> 
> Any thoughts ?
> 
> 
> Rubens
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