nanog mailing list archives
Re: IS-IS on FRR - Is Anyone Running It?
From: Mark Tinka <mark.tinka () seacom mu>
Date: Mon, 6 Apr 2020 10:58:21 +0200
On 6/Apr/20 09:58, Radu-Adrian Feurdean wrote:
I won't speak for Mark, but NO, when you're carrying somebody's else's traffic you do your best to have the MTU on each and every backbone link "high enough" : preferably in the 9200(bytes) range, so you can easily transport 9000(bytes) client packets, and by no means so small that you need to fragment 1500(IP)/1514(Eth) byte packets. If things are really-really bad, 1600 bytes towards the edge.
Yes, this. Within our core, we run 9,178 bytes (which translates to 9,192 bytes on Junos and IOS XR), to support the transport of Jumbo frames for customers that need it, typically l2vpn type services. If VMware ESXi did not limit itself to 9,000 bytes, we wouldn't have needed to set the IS-IS MTU at all, as it would have been inferred from the physical interface of each device.
Back to the original question, I would expect FRR to be able to manually specify a MTU/frame-size, like any other decent NOS (even if it's not a full NOS).
One would have thought. Even if no one is running it, I'd have assumed the developers would have said something. My Google-fu is generally okay, but not on this one :-). Mark.
Current thread:
- Re: IS-IS on FRR - Is Anyone Running It?, (continued)
- Re: IS-IS on FRR - Is Anyone Running It? Randy Bush (Apr 05)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 05)
- Re: IS-IS on FRR - Is Anyone Running It? Anoop Ghanwani (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Radu-Adrian Feurdean (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Radu-Adrian Feurdean (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Saku Ytti (Apr 06)