DELL S50V User Manual

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Border Gateway Protocol IPv4 (BGPv4)

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Allow an AS number to appear in its own AS path

This command allows you to set the number of times a particular AS number can occur in the AS path. The 

 feature permits a BGP speaker to allow the ASN to be present for specified number of times in 

the update received from the peer, even if that ASN matches its own. The AS-PATH loop is detected if the 
local ASN is present more than the specified number of times in the command.

To disable this feature, use the 

 

command in the CONFIGURATION 

ROUTER BGP mode. 

 {IP address | 

 

CONFIG-ROUTER-
BGP

Allow this neighbor ID to use the AS path the specified 
number of times.
Format:
IP Address: A.B.C.D
Peer Group Name: 16 characters
Number: 1-10

You must 

 before assigning it to an AS.

R2(conf-router_bgp)#show conf

!

router bgp 65123

 bgp router-id 192.168.10.2

 network 10.10.21.0/24

 network 10.10.32.0/24

 network 100.10.92.0/24

 network 192.168.10.0/24

 bgp four-octet-as-support

 neighbor 10.10.21.1 remote-as 65123

 neighbor 10.10.21.1 filter-list Laura in

 neighbor 10.10.21.1 no shutdown

 neighbor 10.10.32.3 remote-as 65123

 neighbor 10.10.32.3 no shutdown

 neighbor 100.10.92.9 remote-as 65192

 neighbor 100.10.92.9 local-as 6500

 neighbor 100.10.92.9 no shutdown

 neighbor 192.168.10.1 remote-as 65123

 neighbor 192.168.10.1 update-source Loopback 0

 neighbor 192.168.10.1 no shutdown

 neighbor 192.168.12.2 remote-as 65123

 neighbor 192.168.12.2 update-source Loopback 0

 neighbor 192.168.12.2 no shutdown

R2(conf-router_bgp)#

Local-AS Number 6500

Maintained During Migration

Actual AS Number