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kellogs
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Adding another eBGP router and upgrade to OSPF for IGP

Mon Sep 21, 2015 6:41 am

SOLSept19-core-network.jpg
Dear Mikrotik Experts,

I am in the process of adding another EBGP routers with 2 upstream providers and would like to establish IBGP to the existing EBGP router via vlan 101 on this diagram.

Is it better for me to enable client-to-client-reflection on both EBGP router?

Beneath the EBGP routers we have 7 distribution routers which has total 89 static routes to the current EBGP router.

I would like to eliminate the static routing and has each distribution router connected via OSPF to both eBGP routers for redundancy via vlan 102 and all of them are on /25 subnet.

Could you kindly provide your comment on this setup please?

Thanks!
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wulfgard
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Re: Adding another eBGP router and upgrade to OSPF for IGP

Tue Sep 22, 2015 3:05 am

Hello

just do ibgp and push default route through ospf

1) add loopback interface with /32 ip on each router
2) setup ospf between routers and advertise loopback
3) setup bgp between both loopback address using your AS number
4) for bgp setup use next-hop=self and source address=loopback
5) you are done

i would advise to ask your upstream to send you a default route in bgp
so you can activate "redistribute default route if exist" in ospf

cheers
Thierry
Last edited by wulfgard on Tue Sep 22, 2015 3:12 am, edited 3 times in total.
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wulfgard
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Re: Adding another eBGP router and upgrade to OSPF for IGP

Tue Sep 22, 2015 3:09 am

Oups double click
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