RWerber at epiknetworks
Nov 19, 2009, 11:28 PM
Post #2 of 3
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>-----Original Message-----
>From: cisco-nsp-bounces [at] puck
[mailto:cisco-nsp-bounces [at] puck] On Behalf Of Forrest W.
Christian
>I have a new-to-me Cisco 12008 which I am working on swapping in as a
>replacement for a 7206VXR which was moving way too much traffic....
>GRP,, Engine 1 Giga-E, Engine 0 Quad ATM OC3.
Please be aware that ATM card is not longer supported and will not work
in a more recent IOS. It will also disable dcef on a full-BGP table,
which disables the card.
> Things have gone really well, and I'm quite happy so far... But
ended
>up with one surprise. Didn't realize the 12008 won't bridge a ATM PVC
>to a VLAN (or any ethernet for that matter)...
>Basically we have a few things which we extend an 802.1q vlan across a
>point to point ATM circuit to a far end for. I have a couple of ideas
>on how to get around it, but would really prefer that the 12008 do the
>work. Doesn't look like an option for me - but figured I'd ask if
>anyone knows of something I missed.... The other ends of the ATM
>circuit are various old and new ciscos, some with MPLS, and some not,
>although it doesn't look like the 12008 will do EoMPLS either with the
>engines I have.
>Probably will look at some other options using a tunnel or similar.
With what you have, (I believe) you are out of luck.
Local switching for 'any-to-any' is only supported on the ISE engines
(3+) - all of which are still very expensive.
Option #1 (which I know works)
enable mpls end to end, and acquire an 3GE-GBIC-SC - which is the 3
port. these can be found for under 1000$ on eBay. The reason is the
1GE-GBIC is an engine1 which cannot do "Edge" mpls functionality. the
3GE-GBIC is an engine2 which can.
Then, you do mpls l2transport and a xconnect. Documentation on setting
this up is easily found on ciscos site.
Option #2
To do anything with l2tp I believe you need a tunneling card, which
requires an engine2 (backbone) card. POS-OC48 is most likely going to be
the cheapest at like 500$ on eBay. I have not done this myself, nor
recommend it. it wastes a slot.
Option #3
do L2TP to the recently retired 7200 and do the encapsulation
over IP. This I believe is your only 0$ cost option. I would check to
see if all of your devices will do L2tp.
Evidence of mpls edge support
#show diags 2 | i 3GE
FRU: Linecard/Module: 3GE-GBIC-SC=
#show mpls l2transport hw-capability interface gi2/1
<snip>
Transport type Eth VLAN
Core functionality:
MPLS label disposition supported
Distributed processing supported
Control word processing supported
Sequence number processing not supported
Edge functionality:
MPLS label imposition supported
Distributed processing supported
Control word processing supported
Sequence number processing not supported
</SNIP>
#show diags 0 | i GE
FRU: Linecard/Module: GE-GBIC-SC-B=
#show mpls l2transport hw-capability interface gi0/0
<snip>
Transport type Eth VLAN
Core functionality:
MPLS label disposition supported
Distributed processing supported
Control word processing supported
Sequence number processing not supported
Edge functionality:
Not supported
</snip>
Hope this helps
Ryan Werber
Sr. Network Engineer
Epik Networks
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