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BGP path manipulation with weight statement

Hello,

i have some issues with routes learned over a mpls backbone. The setup is like this

Switch1 ---------- Switch2

   |                        |

Router 1           Router2

   |                        |

   ------ MPLS --------

              |

         Router3

              |

         Switch3

i have on switch3 the network 10.0.0.0/24 which is learned by Router 1 and Router 2 and know as

show ip bgp vpnv4 vrf NCS 10.0.0.0

BGP routing table entry for 65000:100:10.0.0.0/24, version 64

Paths: (1 available, best #1, table NCS)

  Advertised to update-groups:

        2

  Local, (Received from a RR-client)

    172.16.128.252 (metric 5) from 172.16.128.252 (172.16.128.252)

      Origin incomplete, metric 11, localpref 100, valid, internal, best

      Extended Community: RT:65000:1000 OSPF DOMAIN ID:0x0005:0x000000640200

        OSPF RT:0.0.0.0:3:0 OSPF ROUTER ID:172.22.0.241:0

      mpls labels in/out nolabel/19

after enabling a ospf process between R1-S1 and S1-S2 and S2-R2 the route is learned on R1 as

R1#show ip bgp vpnv4 vrf NCS 10.0.0.0

BGP routing table entry for 65000:100:10.0.0.0/24, version 70

Paths: (2 available, best #1, table NCS)

  Advertised to update-groups:

     4

  Local

    172.22.8.6 from 0.0.0.0 (172.16.138.252)

      Origin IGP, metric 1, localpref 100, weight 32768, valid, sourced, best

      Extended Community: RT:65000:1000 OSPF DOMAIN ID:0x0005:0x000000640200

        OSPF RT:0.0.0.0:5:1 OSPF ROUTER ID:172.22.8.241:0

      mpls labels in/out 47/nolabel

  Local, (Received from a RR-client)

    172.16.128.252 (metric 5) from 172.16.128.252 (172.16.128.252)

      Origin incomplete, metric 11, localpref 100, valid, internal

      Extended Community: RT:65000:1000 OSPF DOMAIN ID:0x0005:0x000000640200

        OSPF RT:0.0.0.0:3:0 OSPF ROUTER ID:172.22.0.241:0

      mpls labels in/out 47/19

and R1 installs the OSPF learned route in the routing table of R1 vrf NCS

i changed the config on the routers R1 and R2 to set the weight for the routes from R3 to 32769 and changed the ospf distance for external routes to 250 but still the routes are not correct installed in my routing table.

here is the config

router ospf 100 vrf NCS

router-id 172.22.8.241

auto-cost reference-bandwidth 1000

capability vrf-lite

redistribute bgp 65000 subnets

network 172.22.2.232 0.0.0.7 area 0

network 172.22.8.0 0.0.0.7 area 0

network 172.22.8.241 0.0.0.0 area 0

default-information originate

distance ospf external 250

router bgp 65000

bgp router-id 172.16.138.252

bgp log-neighbor-changes

neighbor RR-WBN2 peer-group

neighbor RR-WBN2 remote-as 65000

neighbor RR-WBN2 update-source Loopback1

neighbor 172.16.128.252 peer-group RR-WBN2

neighbor 172.16.135.252 peer-group RR-WBN2

!

address-family ipv4

  neighbor 172.16.128.252 activate

  neighbor 172.16.128.252 weight 32769

  neighbor 172.16.135.252 activate

  neighbor 172.16.135.252 weight 32769

exit-address-family

!

address-family vpnv4

  neighbor RR-WBN2 send-community both

  neighbor RR-WBN2 route-reflector-client

  neighbor 172.16.128.252 activate

  neighbor 172.16.128.252 weight 32769

  neighbor 172.16.135.252 activate

  neighbor 172.16.135.252 weight 32769

exit-address-family

!

address-family ipv4 vrf NCS

  redistribute connected

  redistribute ospf 100 match internal external 1 external 2

  default-information originate

exit-address-family

somehow the weight statement is not working

R1#show ip bgp vpnv4 vrf NCS

BGP table version is 70, local router ID is 172.16.138.252

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

              r RIB-failure, S Stale, m multipath, b backup-path, x best-external, f RT-Filter

Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path

Route Distinguisher: 65000:100 (default for vrf NCS)

*> 10.0.0.0/24      172.22.8.6               1         32768 i

* i                 172.16.128.252          11    100      0 ?

*> 10.0.8.0/24      172.22.8.6              11         32768 ?

any ideas

thanks in advanced

Alex

1 REPLY
VIP Purple

BGP path manipulation with weight statement

Hello

This seems confusing to me on what your intensions are?

Are you trying to manipulate outbound route path for a specific network ( 10.0.0./24) which is advertised from for example sake - Site A - over mpls into -  site B?

res

Paul

Please don't forget to rate any posts that have been helpful.

Thanks.

Please don't forget to rate any posts that have been helpful. Thanks.
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