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Проблемы с BGP

Cisco 6509, sup2

Version 12.1(11r)E1, RELEASE SOFTWARE (fc1)

BOOTLDR: s222_rp Software (s222_rp-ADVENTERPRISEK9_WAN-M), Version 12.2(18)SXF17a, RELEASE SOFTWARE (fc1)

 

Такая ошибка, и сессия отрубается.

 

*Feb 3 08:55:50: %BGP-3-NOTIFICATION: sent to neighbor X.X.X.X 3/11 (invalid or corrupt AS path) 9 bytes 40020602 0233418A 51

*Feb 3 08:55:50: BGP: X.X.X.X Bad attributes FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 007E 0200 0000 5B40 0101 0040 0206 0202 3341 8A51 4003 04B2 12E2 01C0 0844 0000 3253 0000 33B6 0000 3C89 0000 3E17 0000 5213 0000 7025 0000 8833 0000 9AB8 0000 B9B5 0000 B9B6 0000 BA94 0000 BBBD B9B5 2711 C708 1AC6 C708 4EF2 C708 526C C708 FBF9 18C3 03CF 18C3 03CE 18C3 03CD

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http://lmgtfy.com/?q=cisco+invalid+or+corrupt+AS+path

 

кто-то анонсирует много препендов. возмонжо bgp maxas-limit 10 вылечит:

Invalid BGP formatted update causes peer reset with AS prepending

 

*Note: The title may show up as:

BGP peer resets when receiving update with > 255 AS hops

 

The workaround is to implement <CmdBold> bgp maxas-limit X <NoCmdBold> on the

device that after prepending would need to send an update with over 255 AS

hops. Since IOS limits the inbound prepending value to 10 the most that

could be added iss 11 AS hops (10 on ingress, 10 on egress, and 1 for normal

eBGP AS hop addition). Therefore, a conservative value to configure would be

200 to prevent this condition.

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Синтаксически этот AS_PATH выглядит нормально. В принципе RFC допускает такую ошибку если сессия eBGP и первая AS в AS_PATH не совпадает с AS пира. У Вас это iBGP или eBGP. Если второе, то какой ASN у пира?

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Значит вы подключаетесь к роут-серверу обменника (ну или пир такой странный). С этого надо было и начинать. :)

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