Thank you Alexander,

federico.bini1 · ‎08-24-2015

hi,

i'm trying to configure the redistribution of some static routes in bgp for only one vrf; the problem that I have is when I apply a route-policy; this is my config:

router bgp 65000
bgp router-id 99.99.99.99
address-family ipv4 unicast
network 11.2.37.0/24
!
address-family vpnv4 unicast
additional-paths selection route-policy PIC
!
neighbor 172.31.3.101
remote-as 65000
update-source Loopback1
address-family ipv4 unicast
!
address-family vpnv4 unicast
!
!
neighbor 172.31.3.102
remote-as 65000
update-source Loopback1
address-family ipv4 unicast
!
address-family vpnv4 unicast
!
!
vrf SOMEVRF
rd 10:1
address-family ipv4 unicast

   redistribute connected
   redistribute static route-policy POLICY1
  !
!
!

RP/0/RSP0/CPU0:RackA#show run route-policy POLICY1
Mon Aug 24 06:41:02.682 MET
route-policy POLICY1
if destination in PREFIX1 then
    set med 10
    set origin egp
    prepend as-path 64610
endif
end-policy
!

RP/0/RSP0/CPU0:RackA#show running-config prefix-set PREFIX1
Mon Aug 24 06:42:02.691 MET
prefix-set PREFIX1
10.2.8.17 255.255.255.255 ,
10.10.208.0 255.255.240.0 ,
10.10.244.0 255.255.255.0 ,
10.10.244.40 255.255.255.255 ,
10.10.244.244 255.255.255.255 ,
10.22.152.0 255.255.255.0 ,
10.38.208.0 255.255.240.0 ,
10.38.222.128 255.255.255.224 ,
10.119.0.0 255.255.240.0 ,
10.119.6.191 255.255.255.255 ,
10.119.6.192 255.255.255.255 ,
10.119.15.79 255.255.255.255 ,
10.119.15.200 255.255.255.255 ,
10.119.15.201 255.255.255.255 ,
10.119.15.202 255.255.255.255 ,
10.168.2.0 255.255.255.0 ,
10.168.64.0 255.255.255.0 ,
10.168.180.0 255.255.255.0 ,
10.168.189.0 255.255.255.0 ,
10.170.40.7 255.255.255.255 ,
10.170.40.8 255.255.255.255 ,
10.170.40.9 255.255.255.255 ,
10.170.40.10 255.255.255.255 ,
10.170.40.11 255.255.255.255 ,
10.170.40.12 255.255.255.255 ,
10.170.40.13 255.255.255.255 ,
10.170.40.16 255.255.255.255 ,
10.170.40.21 255.255.255.255 ,
10.170.180.0 255.255.255.0 ,
10.170.182.0 255.255.255.0 ,
10.170.185.0 255.255.255.0 ,
10.171.128.128 255.255.255.192 ,
10.196.89.1 255.255.255.255 ,
10.196.211.0 255.255.255.0 ,
10.196.224.32 255.255.255.240 ,
10.196.224.64 255.255.255.224 ,
10.196.224.128 255.255.255.240 ,
10.239.6.10 255.255.255.255 ,
10.239.6.11 255.255.255.255 ,
10.239.55.0 255.255.255.0 ,
10.239.55.233 255.255.255.255 ,
10.239.55.234 255.255.255.255 ,
10.239.55.249 255.255.255.255 ,
10.239.56.0 255.255.255.0 ,
10.239.57.0 255.255.255.0 ,
10.239.59.0 255.255.255.0 ,
10.239.60.0 255.255.255.0 ,
156.54.78.0 255.255.254.0 ,
156.54.80.0 255.255.254.0 ,
172.18.88.0 255.255.248.0 ,
172.19.0.0 255.255.0.0 ,
172.24.165.0 255.255.255.0 ,
172.27.170.133 255.255.255.255 ,
172.28.219.0 255.255.255.0 ,
172.28.220.0 255.255.255.0 ,
172.29.128.0 255.255.128.0 ,
172.29.240.64 255.255.255.224 ,
172.30.218.0 255.255.255.0 ,
192.168.36.16 255.255.255.240 ,
192.168.132.128 255.255.255.128 ,
192.168.170.0 255.255.255.224 ,
192.168.180.0 255.255.255.0 ,
192.168.181.0 255.255.255.0 ,
192.168.182.0 255.255.255.0 ,
192.168.183.0 255.255.255.0 ,
192.168.184.0 255.255.255.0 ,
192.168.185.0 255.255.255.0 ,
192.168.186.0 255.255.255.0 ,
192.168.187.0 255.255.255.0 ,
192.168.197.64 255.255.255.192 ,
192.168.200.64 255.255.255.224 ,
192.168.200.65 255.255.255.255 ,
192.168.200.88 255.255.255.255 ,
192.168.200.90 255.255.255.255 ,
192.168.200.91 255.255.255.255 ,
192.168.200.97 255.255.255.255 ,
192.168.200.113 255.255.255.255 ,
192.168.249.0 255.255.255.0
end-set
!

RP/0/RSP0/CPU0:RackA#show run router static
Mon Aug 24 06:43:54.254 MET
router static
vrf SOMEVRF
address-family ipv4 unicast
   10.10.208.0/20 192.168.196.38
   10.10.244.0/24 10.168.164.17
   10.10.244.40/32 10.168.164.17
   10.10.244.244/32 10.168.164.18
   10.22.152.0/24 10.38.223.12
   10.24.8.0/21 BVI1001
   10.38.208.0/20 BVI1001
   10.170.44.4/32 BVI1001
   192.168.249.0/24 BVI1001
!
!
!

RP/0/RSP0/CPU0:RackA#

This is what I receive on the other PE (IOS):

PE-A#sho ip bgp vpnv4 vrf SOMEVRF | i 99.99
*>i 10.24.8.0/21     99.99.99.99             10    100      0 64610 e
*>i 10.38.208.0/20   99.99.99.99             10    100      0 64610 e
*>i 10.170.44.4/32   99.99.99.99             10    100      0 64610 e
                       99.99.99.99              0    100      0 ?
*>i 192.168.5.0      99.99.99.99              0    100      0 ?
*>i 192.168.6.0      99.99.99.99              0    100      0 ?
                       99.99.99.99              0    100      0 ?
*>i 192.168.249.0    99.99.99.99             10    100      0 64610 e
*>i 200.200.210.0    99.99.99.99              0    100      0 ?
PE-A#

How you can see all static routes have the changed attributes (not only routes that match prefix-set PREFIX1).

Tell me where is the mistake

thank's

xthuijs · ‎08-24-2015

hi frederico,

I think (part of) the problem is that you're denying prefixes because of the missing :

else

pass

in your route policy.

Would modify it to:

route-policy POLICY1
if destination in PREFIX1 then
    set med 10
    set origin egp
    prepend as-path 64610

else

pass
endif
end-policy

I just tested with XR 524 and it works as it should.

See here for handy reference:

https://supportforums.cisco.com/document/88676/asr9000xr-understanding-and-using-rpl-route-policy-language

cheers!

xander

federico.bini1 · ‎08-25-2015

Thank you Alexander,

unfortunatly the policy does not work; then you have to consider that i need to announce only subnet of PREFIX1 and PREFIX2.

Regards

Federico

federico.bini1 · ‎08-26-2015

Hi Alexander,

only to say that we solved the problem; it was a wrong prefix-set sintax:

we used something like:

prefix-set PREFIX1

10.2.8.17 255.255.255.255 ,

10.10.208.0 255.255.240.0 ,

10.10.244.0 255.255.255.0 ,

..............

while the correct form was:

10.2.8.17/32,

.............

thank you for your time

Regards

Federico

xthuijs · ‎08-26-2015

I totally overlooked that Frederico, but indeed the prefixes are configured with a /<bits> as opposed to the decimal long mask.

great find and also thanks for letting us know that the issue is resolved.

cheers

xander

ios xr and bgp redistribute static route-policy in vrf