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Open message error between iBGP peers

We are trying to establing an ibgp session between a Cisco 3600 series running IOS IP Plus 12.3 and an Ericsson node running Gated over VXWorks platform. We have used the following configuration as far as the cisco is consirned:

router bgp 64445

no synchronization

bgp log-neighbor-changes

neighbor 192.168.130.249 remote-as 64445

neighbor 192.168.130.249 description Gp BG to Gn1

neighbor 192.168.130.249 send-community extended

neighbor 192.168.130.249 soft-reconfiguration inbound

neighbor 192.168.130.250 remote-as 64445

neighbor 192.168.130.250 description Gp BG to Gn2

neighbor 192.168.130.250 send-community extended

neighbor 192.168.130.250 soft-reconfiguration inbound

The following erros are encountered on the VXWorks site (Gated).

Open message error code 2. Authentication failure (Sub 5).

Regards.

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: Open message error between iBGP peers

The issue is due to the Ericsson node not complying to RFC2842 (Capabilities Advertisement with BGP-4) and therefore can't handle the capability option in the open message coming from the Cisco router properly. There is a hidden command that you can use in IOS to revert to a pre-RFC2842 behavior. This command is :

nei x.x.x.x dont-capability-negotiate.

This should solve your issue.

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México 
Paseo de la Reforma 222 Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
1 REPLY
Cisco Employee

Re: Open message error between iBGP peers

The issue is due to the Ericsson node not complying to RFC2842 (Capabilities Advertisement with BGP-4) and therefore can't handle the capability option in the open message coming from the Cisco router properly. There is a hidden command that you can use in IOS to revert to a pre-RFC2842 behavior. This command is :

nei x.x.x.x dont-capability-negotiate.

This should solve your issue.

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México 
Paseo de la Reforma 222 Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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