nanog mailing list archives
Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue)
From: Nick Hilliard <nick () foobar org>
Date: Fri, 02 Dec 2016 21:16:58 +0000
Job Snijders wrote:
I consider this a cascading failure. Clearly IEEE's change had a ripple effect, and suprised a number of implementers, and ended up hurting us.
this would be credible if this were a previously unknown problem, but it isn't. It's been known for years that you need to be careful when handling mpls encapsulated packets which encapsulate L2 frames and where the source mac address starts with 4 or 6. This is not a new problem and because it's not new, there is no good reason for vendors to make the same mistakes again and again. TBH, it beggars belief that new L2 hardware is being thrown out the door which is unable to forward frames of this form due to hardware limitations, and that it's apparently unfixable. Nick
Current thread:
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue), (continued)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Job Snijders (Dec 06)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Mike Jones (Dec 06)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Alexandru Suciu via NANOG (Dec 07)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Job Snijders (Dec 07)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Saku Ytti (Dec 06)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Job Snijders (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Nick Hilliard (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Sukumar Subburayan (sukumars) (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Nick Hilliard (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Simon Lockhart (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Randy Bush (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Leo Bicknell (Dec 06)