03-31-2008 05:32 PM
Hi
I would like use the ethertype 0x8100 for the s-vlan tag.
i am using an 3845 Router.
example:
interface gig0/1
..
interface gig0/1.1
ip address x.x.x.x x.x.x.x
encapsulation dot1Q 500 second-dot1q 100
because its not possible to enter at the main-interface the command:
"dot1q tunneling ethertype 0x8100"
only ethertype 0x88a8 and 0x9100 is allowed!
so i ommited this command!
does this config work?
and which ethertype uses the router?
thanks
04-04-2008 01:42 PM
I have seen this command work with Cisco IOS XR software. http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/qinq.html
04-10-2008 12:29 AM
thats right!
but the XR-Software isn't working with 3845 Router!
04-10-2008 04:52 AM
By default Cisco uses 0x8100, which IANA assigned to 802.1Q.
0x88a8 and 0x9100 are not assigned by IANA.
See: http://www.iana.org/assignments/ethernet-numbers
Hope this helps.
04-15-2008 01:26 AM
Hi
with infistream i could intercept the frames, which the router is sending into the lan.
so i can see now, that the frames are really double-tagged with ethertype 0x8100.
thanks
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