[nsp] AToM (on 7600 w/ SUP720) : summary

[Ian Cox]

There are two types of EoMPLS for the 6500/7600:
  - WAN based (FlexWAN or OSM module using PXF enabled interface) must be 
facing the MPLS core
  - H/W based Performed by the forwarding ASICs on the Supervisor or DFC module

EoMPLS Support
                                 WAN based       H/W based
-----------------------------------------------------------
Supervisor 1                    no              no
Supervisor 2                    yes             no
Supervisor 720 PFC3a            yes             no
Supervisor 720 PFC3bXL          yes             yes


H/W based and WAN based differ also in the ability to perform local L2 
switching and MAC address learning. H/W based EoMPLS functions like EoMPLS 
on 7200/7500/12000 where you don't learn MAC addresses or perform local 
switching of traffic between ports. WAN based EoMPLS can perform local 
switching and does do MAC address learning.

WAN based EoMPLS is configured upon the SVI interface, and H/W based EoMPLS 
is configured on a physical or sub-interface of a physical interface. The 
following reference will be of use:

http://www.cisco.com/univercd/cc/td/doc/product/core/cis7600/cfgnotes/optical/122sx/mpls.htm#1128955

Key Differences between PFC3a/DFC3a and PFC3bXL/DFC3bXL
   - Support for H/W based EoMPLS only on PFC3bXL
   - Increased FIB table size on PFC3bXL (4x the size of PFC3a)
   - Support for 256k netflow table on PFC3bXL vs 128k on PFC3a
   - Support for Access control list entry counters on PFC3bXL


Ian

At 03:15 PM 1/6/2004 +1100, Andrew Fort wrote:
>On 6/01/2004 11:07 AM, Ian Cox wrote:
>
>>Please everyone the release notes really do mean that EoMPLS is only 
>>supported on PFC3BXL, and it is not supported on PFC3A. If you have a 
>>problem you are going to get told it is not supported.
>
>
>We understand the what, but not the why.  So... Why?  What is the 
>difference between the PFC3A and PFC3BXL in terms of handling these more 
>complex MPLS features?  I get the impression it'll be supported on PFC3A 
>down the line, is this for sure? (but it does seem a bit strange that it's 
>supported on the latest hardware first.. then again.. maybe not that 
>strange :).
>
>-afort
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