nanog mailing list archives
Re: IS-IS on FRR - Is Anyone Running It?
From: Saku Ytti <saku () ytti fi>
Date: Mon, 6 Apr 2020 12:28:56 +0300
On Mon, 6 Apr 2020 at 12:16, Mark Tinka <mark.tinka () seacom mu> wrote:
Which is what this whole thread is about. How do I set that, manually, without changing the physical interface MTU?
You want to run your physical at high MTU and you also like ISIS to come up? FRR doesn't seem to support Cisco proprietary EthernetII based ISIS, so it'll only do 802.3 standard. Have you tried to just use what ever interface MTU, and NOT pad on far-end cisco? If I read the code right, this should be then standard max_size 802.3 and it should come up. If you force Cisco to pad, it'll use the EthernetI hack, which is not supported by FRR, and it won't work. I noticed in lab just now, if I set 'pad sometimes' on IOS-XR, it won't pad at all for >1500B MTUs, so seems like 'sometimes' stops Cisco from using the EthernetII hack. -- ++ytti
Current thread:
- Re: IS-IS on FRR - Is Anyone Running It?, (continued)
- 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)
- 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? Mark Tinka (Apr 06)