[j-nsp] tag-protocol-id matching in vlan-tags

Addy Mathur addy.mathur at gmail.com
Thu Jul 28 06:54:52 EDT 2011


On Wednesday, July 27, 2011, David Ball <davidtball at gmail.com> wrote:
> MX running 10.0 (DPCE-R-20GE-2XGE for int in question)
>
> Should I expect that a logical unit configured with 'vlan-tags outer
> 0x88A8.100' would also permit frames using TPID 8100 and VLAN ID 100 ?
>  I kinda expected not (since it doesn't 'match'), yet if I change my
> test set to send normal 0x8100.100 frames, they're still accepted by
> the interface (config below) and stuffed into the associated VPN.
>
> [edit interfaces ge-1/1/0]
> flexible-vlan-tagging;
> encapsulation flexible-ethernet-services;
> gig-ether-options {
>  no-auto-negotiation;
>  ethernet-switch-profile {
>    tag-protocol-id 0x88A8;
>  }
> }
> unit 100 {
>  encapsulation vlan-ccc;
>  vlan-tags outer 0x88A8.100;
>  input-vlan-map pop;
>  output-vlan-map push;
> }
>
>  Are my expectations that "specifying the TPID in the vlan-tags
> statement would ONLY match frames with that TPID" wrong?  Practice
> would indicate that I'm wrong, but I guess I'm wondering if this is
> expected behaviour.

David:  I don't believe your expectation is incorrect. Could you please post
the exact JUNOS release (including minor version) and the output of "show
interface ge-1/1/0"?

>
> TIA,
>
> David
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