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

Tue May 27 10:30:15 EDT 2008

Sub-int EoMPLS works great, no idea about doing the same on the  
NM-16ESW.  The ISR is a software-based platform and it should work at  
on one of the built-in ports, but I don't know about the feature  
support/limitations when combined with the ESW modules.

Phil

On May 27, 2008, at 10:01 AM, Justin Shore wrote:

> 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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