[nsp] Links UP/Down

[Security]

I am using gigbit line card GEIP  on C7507 side angdGbigs on the switch.
 
>Are you using cisco Gbics? Or a gigbit line card?
>
>-----Original Message-----
>From: M.Palis [mailto:security at cytanet.com.cy] 
>Sent: Sunday, October 12, 2003 10:48 PM
>To: cisco-nsp at puck.nether.net
>Subject: [nsp] Links UP/Down
>
>Dear all
>
>
>We are facing a some problems during the last month with links going
>up/down
>simultaneously causing BGP flapping and therefore affecting our traffic
>and
>the traffic of our customers. We have 2 C7507 with connections to
>upstream
>ISPs on both routers and connection to international customers to one of
>the
>routers. The routers are connected together through a Gigabit switch.
>All
>links on both routers (very strange)  go UP/Down at random periods
>with
>out any cause.
>
>We investigate it with our transmition and the did not find anything.
>All
>links follow a  different path through our transmission.. We change some
>line cards on the C7507 again with out success. IOS that we are using is
>122-15.T7.
>
>We are thinking now the case of a kind of attack that causes flapping of
>the
>links..
>
>Does anyone of you face a similar situation before?
>
>I will appreciate and help/advice/opinion
>
>REGARDS
>
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