nanog mailing list archives
Re: IS-IS on FRR - Is Anyone Running It?
From: Saku Ytti <saku () ytti fi>
Date: Mon, 6 Apr 2020 10:49:22 +0300
On Mon, 6 Apr 2020 at 10:36, Anoop Ghanwani <anoop () alumni duke edu> wrote:
The only thing that is larger in your network is hellos, and I'm not even sure how that works, considering 802.3 cannot signal larger frames than 1500B.Probably this method: https://en.wikipedia.org/wiki/EtherType#Jumbo_frames
Mikael Abrahamson and I quickly looked at this, some platforms (IOS, IOS-XR, EOS) use ethernetII + 8870, but only for hellos and revert back to standard 802.3 after. Some platforms (Junos) accept 8840 hello, but do not send it. So after 1500B MTU detection does not work by-standard and everyone has been forced to implement CiscoISIS to just get ISIS up, and Cisco is forced to accept subMTU hello equally to interoperate with non8840 hosts. It's really time to kill 802.3 and CLNS and do pure ISIS over ethernetII+IPv6, no one really understands how all this works, it's complex and fragile. -- ++ytti
Current thread:
- IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 03)
- Re: IS-IS on FRR - Is Anyone Running It? Jeremy Austin (Apr 03)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 07)
- Message not available
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 04)
- Re: IS-IS on FRR - Is Anyone Running It? John St.Martin (Apr 06)
- Re: IS-IS on FRR - Is Anyone Running It? Mark Tinka (Apr 05)
- 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? Mark Tinka (Apr 04)
- 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? Jeremy Austin (Apr 03)
- 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)