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Simple question on advertising serial link network, backup circuit

news2010a
Level 3
Level 3

Imagine I have the following functional configuration below.

Then I am exploring a backup circuit via Satellite in case primary MPLS circuit goes down the hill. I get to the backup circuit via the ip route on the bottom - OK.

Note that 98.65.252.60/30 is my serial connection related network connecting to the MPLS network.


Question:
If my goal is to advertise networks and make sure everything is functional in case MPLS circuit goes down, is it important and necessary to advertise 98.65.252.60/30 via BGP? I am just wondering about that since my neighbor command in BGP is pointing to that one. But I am not totally sure... please advise.

MYROUTER
router bgp 100
no synchronization
bgp router-id 99.33.37.249
bgp log-neighbor-changes
network 99.33.36.0 mask 255.255.255.0
network 99.33.37.248 mask 255.255.255.255
network 99.33.37.249 mask 255.255.255.255
network 99.34.69.0 mask 255.255.255.0
aggregate-address 99.33.36.0 255.255.254.0 summary-only
neighbor 98.65.252.61 remote-as 65033
neighbor 98.65.252.61 description MPLS PROVIDER
no auto-summary
!

!description this is to get to the BACKUP CIRCUIT

ip route 0.0.0.0 0.0.0.0 98.65.254.37 250 name PROVIDER-BACKUP

1 Reply 1

SunilKhanna
Level 1
Level 1

No, its not neccessary to advertise the link address (in your case 98.65.252.60/30) on which neighborship is formed. untill there is a specific requirement or a subnet has to be advertised.

Pls vote if you think the post was helpful.

Regards, Sunil Khanna