[c-nsp] MPLS usage by the bgp process in a vrf-lite setup

Gordon Bezzina gordon.bezzina at bell.net.mt
Thu Aug 28 11:44:04 EDT 2008


Hi,

I am using the vrf-lite setup on the 7600 using rsp720-cxl.

This is the router:
c7600c#sh mod
Mod Ports Card Type                              Model              Serial
No.
--- ----- -------------------------------------- ------------------
-----------
  4    8  8 port 1000mb GBIC Enhanced QoS        WS-X6408A-GBIC     ***
  5    2  Route Switch Processor 720 (Hot)       RSP720-3CXL-GE     ***
  6    2  Route Switch Processor 720 (Active)    RSP720-3CXL-GE     ***

...

Mod  Sub-Module                  Model              Serial       Hw
Status 
---- --------------------------- ------------------ ----------- -------
-------
  5  Policy Feature Card 3       7600-PFC3CXL       ***	  1.0    Ok
  5  C7600 MSFC4 Daughterboard   7600-MSFC4         ***	  1.1    Ok
  6  Policy Feature Card 3       7600-PFC3CXL       ***	  1.0    Ok
  6  C7600 MSFC4 Daughterboard   7600-MSFC4         ***	  1.1    Ok

Mod  Online Diag Status 
---- -------------------
  4  Pass
  5  Pass
  6  Pass
c7600c#

Now I have a bgp peer within a vrf which is receiving the full table. As a
control
I am filtering out most of it. The problem is that bgp is creating an mpls
label for
Every ipv4 route. And most importantly I do not use mpls for routing.

c7600c#sh ip bgp vpnv4 vrf VF summary 
...

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down
State/PfxRcd
A.A.A.86        4 00000   85260   39101    32158    0    0 3w3d        29718

c7600c#sh platform hardware cap | b L3
L3 Forwarding Resources
 Module              FIB TCAM usage:                     Total        Used
%Used
   5                     72 bits (IPv4, MPLS, EoM)      524288       60529
12%
                        144 bits (IP mcast, IPv6)      262144            4
1%

                     detail:      Protocol                    Used
%Used
                                  IPv4                       30530
6%
                                  MPLS                       29999
6%
                                  EoM                            0
0%

                                  IPv6                           1
1%
                                  IPv4 mcast                     3
1%
                                  IPv6 mcast                     0
0%

            Adjacency usage:                     Total        Used
%Used
                                               1048576       30206
3%



The problem is that this is doubling the usage of my resources. Is there a
way to reduce it,
i.e reduce or disable the creation of the mpls?

Thanks in advance
Best regards

Gordon





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