[c-nsp] Pipe Mode with an Explicit NULL LSP

[J C]

Those two commands that I listed were required (as far as I know) in configuring an end-to-end solution for Pipe Mode w/ Explicit Null.  The 'set qos-group' and/or 'set discard-class' command(s) was used on the Egress PE link to capture the QoS settings from the MPLS EXP value that would have been lost on the final pop.

The issue I'm having right now is that I'm not seeing any matches on my 'match mpls experimental topmost' policy-maps.

CPE
------------
class match-any TEST
 match access-group 1

access-list 1 permit 192.168.1.0 0.0.0.255

policy-map TEST
 class TEST
  set mpls experimental imposition 5

interface Fa0/0
ip address 192.168.1.1 255.255.255.0
service-policy TEST input

interface Fa0/1
ip address 172.31.1.1 255.255.255.0
mpls ip encapsulate explicit-null

*A 'show policy-map interface Fa0/0' verifies that traffic is being 'marked' with MPLS EXP 5.

7600-PE
-----------

interface GigabitEthernet1/1
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 500
 switchport trunk allowed vlan 500
 switchport mode trunk
 switchport nonegotiate
 load-interval 30
 no snmp trap link-status
 mls qos trust dscp

interface Vlan500
 description Test-Site#1
 ip vrf forwarding TEST
 ip address 172.31.1.2 255.255.255.0
 load-interval 30
 mpls ip


I've tried placing a variety of policy-maps on both interface Gi1/1 and Vlan 500 to determine if the MPLS bits are carrying through to the PE.  So far nothing.  The backbone egress policy map on the TenGigabitEthernet interface shows that my test traffic is flowing through matching class-default; so I know that traffic isn't getting matched.

Is it possible that the 7600-PFC3C doesn't support Pipe Mode with Explicit Null LSP...and that it just supports Short Pipe, Pipe Mode and Uniform mode?  After reading the documentation on the PFC I don't see any mention to Pipe mode with Explicit Null.




Date: Fri, 4 Jul 2008 15:14:08 +0000
From: gulerozgur at yahoo.co.uk
Subject: Re: [c-nsp] Pipe Mode with an Explicit NULL LSP
To: cisco-nsp at puck.nether.net; juniper84 at live.com


Can't you simply match the exp bit with explicit-null on egress PE?

Why do you need the qos-group?

Cheers
Ozgur

--- On Fri, 4/7/08, J C <juniper84 at live.com> wrote:
From: J C <juniper84 at live.com>
Subject: [c-nsp] Pipe Mode with an Explicit NULL LSP
To: cisco-nsp at puck.nether.net
Date: Friday, 4 July, 2008, 1:10 PM

I'm in the midst of configuring a number of 7600 switches and I'm
running into an issue where I'm unable to successfully have Pipe Mode with
an Explicit NULL working correctly.

According to some of the restrictions I've read...the 'set
qos-group' and 'set discard-class' commands are not supported in
the 12.2SR IOS.  In previous configurations with Pipe Mode with Explicit Null
I've used these two commands to preserve the classification.

Does anyone have any experience with this type of QoS configuration on
 this
product?

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