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sander123
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Joined: Wed Oct 28, 2020 11:58 pm

disruption on BGP update/conversion v7.4

Fri Aug 26, 2022 2:35 pm

Hello,

I don't know if it is normal, and cannot found allot of experience on this part of my problem from other Mikrotik Users.

We have 4 CCR on this moment:
- Router1: CCR1072
- Router2/3/4: CCR2116

Router 3 and 4 are used for PPPoE for customers, default route to router1 through OSPF and failover to router2.

Router1 and 2 are used for BGP with our Transit and Peering, and have a IBGP session together.
Also have router1 and 2 a internal VLAN (for public IP's, so no nat) in datacenter with VRRP interface, used for servers etc.
They have also connection tracking disabled.

Router1 has 4 transit providers and peers on 2 Internet Exchanges
Router2 has 1 transit provider (same as 1 of the 4 providers of router1), router 2 is mainly used for back-up function.

Problem:
When we enable a transit or peering with route server on a IXP we get higher latency during updates and some packet loss.
Also the routes impacted by the new updatet (which get a new shorter) route have about 10/20 seconds no traffic.

I can understand that traffic is disrupted when a transit/peer is disconnected abruptly, but is it normal that it happens on connecting to a transit/peer?

Questions:
1. Is there anything we can do to prevent this or to optimise this?
2. is it a good way/design to use router1/2, who are used for BGP, as gateway with VRRP for servers or is het recommend to add some kind of core routers for it with IBGP and use router1/2 only like edge routers.

I hope my question and explanation is clear, if not please let me know!
Thank you!

Regards,
Sander
 
sander123
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Frequent Visitor
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Posts: 57
Joined: Wed Oct 28, 2020 11:58 pm

Re: disruption on BGP update/conversion v7.4

Fri Aug 26, 2022 5:02 pm

Will interruption be shorter when i add a core router which i use as gateway for clients?
And give this core route only IBGP to router1 and router2 so routing table is a lot smaller?
 
sander123
Frequent Visitor
Frequent Visitor
Topic Author
Posts: 57
Joined: Wed Oct 28, 2020 11:58 pm

Re: disruption on BGP update/conversion v7.4

Tue Oct 18, 2022 3:03 pm

Anyone with recommendations for our network design?

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