Question about IPV6 route-map

[hfakoor222]

I'm studying and this has me confused as I am trying to match 2001:db8:acad:224::1 and  2001:db8:acad:225::1

The prefix list below I assumed captures these bgp route advertisements from the peer

,

ipv6 prefix-list EVEN-NETWORK-6 permit 2001:db8:acad:224::/63
route-map ROUTE-BALANCE6 permit 10
 match ipv6 address prefix-list EVEN-NETWORK-6
  set local-preference 200
  exit
router bgp 41
 bgp router-id 3.3.3.3
 neighbor 2001:db8:acad:2000::1 remote-as 15
 neighbor 2001:db8:acad:2001::1 remote-as 15
 neighbor 209.165.200.226 remote-as 15
 neighbor 209.165.200.226 update-source loopback 0
 neighbor 209.165.200.226 ebgp-multihop 3
 address-family ipv4 unicast
  neighbor 209.165.200.226 activate
  no neighbor 2001:db8:acad:2000::1 activate
  no neighbor 2001:db8:acad:2001::1 activate
  network 209.165.227.1 mask 255.255.255.255
  exit
 address-family ipv6 unicast
  no neighbor 209.165.200.226 activate
  neighbor 2001:db8:acad:2000::1 activate
  neighbor 2001:db8:acad:2001::1 activate
  neighbor 2001:db8:acad:2001::1 route-map ROUTE-BALANCE6 in

Now the answer key says to do this, to catch both the prefixes and apply local pref:

no ipv6 prefix-list EVEN-NETWORK-6 permit 2001:db8:acad:224::/63
R3(config)# ipv6 prefix-list EVEN-NETWORK-6 sequence 5 permit 2001:db8:acad:224::/64
R3(config)# ipv6 prefix-list EVEN-NETWORK-6 sequence 10 permit 2001:db8:acad:225::/64

Now the answer key is right and I am wrong,

Why didn't the original prefix list match those routes?

[Harold Ritter · Accepted solution]

Hi @hfakoor222 ,

The prefix-list you initially configured only matches the prefix 2001:db8:acad:224::/63 (exact match). If you want the prefix-list to match the /63 and the more specific prefixes (i.e. 2001:db8:acad:224::/64 and 2001:db8:acad:225::/64) you need to modify it as follow:

ipv6 prefix-list EVEN-NETWORK-6 permit 2001:db8:acad:224::/63 le 64

Regards,

[hfakoor222]

Thanks.