[c-nsp] EoMPLS, 2800s & 7600 w/ 6700 linecards

[Justin Shore]

Any takers?  EoMPLS with an ISR on one end terminating the L2VPN in a 
VLAN for use on a NM-16ESW and a 7600 on the other end running SR with 
6700 linecards doing sub-int based EoMPLS if needed.  Any thoughts or 
opinions?

Muchas gracias
  Justin



Justin Shore wrote:
> I have a customer wanting a new PtP circuit and I'm trying to figure out
> how to get it to them.  We don't have the ability to build out a L2 path
> all the way to them without burning more fiber and that's just not
> scalable.  I'm looking at other options, namely MPLS.
> 
> Here's what I'm basically trying to figure out in case people don't want 
> to read all the stuff below.  1) can I pick up a VLAN off of a 1Q trunk 
> on a 6700 series linecard in a 7600 and use it for EoMPLS?  I'd prefer 
> to pick it up with a SVI but I could do the sub-int-based VLAN if 
> needed.  2) can a 2800 terminate the xconnect in a VLAN that can be 
> assigned to a NM-16ESW or HWIC?  I'm planning on replacing the 2821 with 
> a 7201 and a switch down the road so in the future I can also do the 
> sub-int-based xconnect termination on the 7201's ints facing the switch. 
>   For EoMPLS is using sub-interfaces the most common implementation 
> method with the hardware I have to work with?
> 
> Here's the long version:
> 
> I touch the customer with fiber using media converters attached to a
> NM-16ESW on a 2821.  The 2821 is dual-homed to the 7600s in the CO off
> of the 2800's built-in GigE ports.  The IGP is IS-IS but I'm working on
> putting customer prefixes into iBGP.  I have not extended MPLS to the
> edge devices that can support it, yet.  I figured though that this
> circuit would prompt me to do that.  The circuit would be dropped a
> dozen miles away at another CO and handed to us on Ethernet.  I'm
> working on another project to place a 15454 at each of the 2 COs and
> using Xponder cards to transport numerous GigE PtP links between the
> sites over a pair of 10G rings.  I'm considering placing a single (or
> pair) 4948 at each site to combine lower bandwidth PtPs together before
> feeding a single GigE into an Xponder, ie not wasting expensive ports on
> the the expensive Xponders.
> 
> What I'm thinking about here is taking the PtP at the remote CO via
> Ethernet into a 4948 or Xponder on a specific VLAN.  Then carrying that
> down to one of the 7600s (no DWDM filters at this time).  Picking up
> that VLAN and sticking it in a L2VPN.  Adding MPLS to the links between
> the 2821 and the 7600s.  And finally dropping off that L2VPN on a VLAN
> on the 2821 assigned to a 1Q trunk on the NM-16ESW.  Also, I'll add an 8
> port 2960 or 3560 at the customer's site to break out the VLANs off the
> 1Q trunk and offer up individual links to the customer.  I've learned
> through past dealings with the 6700 linecards in my 7600s that I have
> very limited MPLS capabilities to work with.  How do I do stuff a VLAN
> into a L2VPN from a 1Q trunk coming into a 6724-SFP or 6748-GE?  Second,
> on the 2800, how do I terminate the L2VPN in a VLAN that I can use on
> the NM-16ESW?  What's in the middle should be relatively easy.  It's the
> edges that I'm struggling with.
> 
> I see that 12.4(11)T added AToM support to the ISRs and it specifically
> mentioned "Ethernet to VLAN Mode" as an option.  I'm running a more
> recent 12.4T release anyway so this should work fine.  Unfortunately I
> haven't been able to find any implementation docs.  All I can find are
> general docs or sales docs.
> 
> http://www.cisco.com/en/US/products/ps6441/prod_bulletin09186a00804a8728.html#wp1083948
> 
> I may have the ability to place a ME3750 at the remote CO.  If that 
> happens then I should be able to do EoMPLS from that edge back to the 
> 2800.  I do not know if I'll be able to free up that ME3750 though.  So 
> I need to know if I can set up EoMPLS with VLANs on the 7600 and 2800 
> specifically.  What's in the middle I'm less concerned about.
> 
> Thanks
>   Justin
> 
> 
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