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: Saku Ytti <saku () ytti fi>
Date: Sat, 3 Dec 2016 01:17:48 +0200
On 2 December 2016 at 18:16, Alia Atlas <akatlas () gmail com> wrote:
This sounds related to the well-known (at least 10+ years) issues around guessing the type of IP packet by looking at the first nibble of the encapsulated packet. Take a quick look at RFC 7325, section 2.4.5.1 bullet 6. This is what using the pseudo-wire code-word is meant to protect against. I don't know if that's an option for networks using this.
Some devices by default look inside pseudowires to find IP inside them, in this case even control-word won't help, you'll need to also disable looking inside pseudowire. -- ++ytti
Current thread:
- 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) Christopher Morrow (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) Christopher Morrow (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Christopher Morrow (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Alia Atlas (Dec 02)
- Re: Forwarding issues related to MACs starting with a 4 or a 6 (Was: [c-nsp] Wierd MPLS/VPLS issue) Saku Ytti (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) 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) Christopher Morrow (Dec 02)
- 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)