[frr] syntax for route map matching ipv6 prefix

[Donald Sharp]

Thomas -

Here is what I am seeing:

s1 ----- robot

s1's config:
!
router bgp 10
 bgp router-id 10.0.2.15
 no bgp network import-check
 neighbor 4.3.2.1 remote-as external
 neighbor fe:c002:1:2::2 remote-as 10
 neighbor fe:c002:1:2::13 remote-as external
!
 address-family ipv6 unicast
  network 3:2:1::/64
  neighbor fe:c002:1:2::2 activate
  neighbor fe:c002:1:2::13 activate
 exit-address-family
!

 s1# show bgp ipv6 unic
BGP table version is 4, local router ID is 10.0.2.15
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
              i internal, r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 3:2:1::/64       ::                       0         32768 i
*> 2001:db8:1cc:222::/64
                    ::                       0         32768 i
*> 2001:db8:1cc:223::/64
                    ::                       0         32768 i
*> 2002:db9:432:1::/64
                    ::                       0         32768 i

Total number of prefixes 4
s1#

on robot we have:

!
router bgp 44
 neighbor fe:c002:1:2::1 remote-as external
 !
 address-family ipv6 unicast
  neighbor fe:c002:1:2::1 activate
  neighbor fe:c002:1:2::1 route-map V6-RM in
 exit-address-family
!
!
ipv6 prefix-list V6-PREFIX seq 5 permit 2001:db8:1cc:222::/64
!
route-map V6-RM permit 10
 match ipv6 address prefix-list V6-PREFIX
!

robot.cumulusnetworks.com# show bgp ipv6
BGP table version is 5, local router ID is 192.168.122.1
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
              i internal, r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 2001:db8:1cc:222::/64
                    fe80::a00:27ff:fe96:bff9
                                             0             0 10 i

Displayed  1 routes and 1 total paths
robot.cumulusnetworks.com#


Let's add a new item to the prefix-list:
robot.cumulusnetworks.com# conf t
robot.cumulusnetworks.com(config)# ipv6 prefix-list V6-PREFIX seq 10
permit 2002:db9:432:1::/64
robot.cumulusnetworks.com(config)# end
robot.cumulusnetworks.com# show bgp ipv6
BGP table version is 5, local router ID is 192.168.122.1
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
              i internal, r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 2001:db8:1cc:222::/64
                    fe80::a00:27ff:fe96:bff9
                                             0             0 10 i

Displayed  1 routes and 1 total paths

whoops...

robot.cumulusnetworks.com# clear bgp *
robot.cumulusnetworks.com# show bgp ipv6
BGP table version is 8, local router ID is 192.168.122.1
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
              i internal, r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 2001:db8:1cc:222::/64
                    fe80::a00:27ff:fe96:bff9
                                             0             0 10 i
*> 2002:db9:432:1::/64
                    fe80::a00:27ff:fe96:bff9
                                             0             0 10 i

Displayed  2 routes and 2 total paths
robot.cumulusnetworks.com#

It sure looks like some sort of soft clear issue.  I've filed:
https://github.com/freerangerouting/frr/issues/126

I am not sure why this does not work at the moment.  I would have
expected it too.

donald

On Thu, Jan 26, 2017 at 10:48 AM, Thomas Hilse <thhi.1964 at gmail.com> wrote:
> Hi team,
>
> I have tried FRR (version
> 2.0-rc0-ci.NetDEF.org-20170126.021714-git.1e78204) downloaded from the
> "netdef" build system:
>
> https://ci1.netdef.org/ (FRR build #53 - version for freebsd 10.3)
>
> In my test setup - dual homed connection to one ISP - all seems to work
> as expected. (quagga 1.1.1 has a regression -
> https://bugzilla.quagga.net/show_bug.cgi?id=870
> FRR in my setup is not affected from this regression.)
>
> However I am wondering how to define a route map matching an ipv6 prefix
> in FRR. The syntax which is working with quagga seems to be invalid in
> FRR (or not supported). I am using route maps to filter the
> redistribution of routes and to modify the BGP route metricies between
> the two connections to our ISP.
>
> ipv6 prefix-list V6-PREFIX seq 5 permit 2001:db8:1cc:222::/64
> !
> route-map V6-RM permit 10
>   match ipv6 address prefix-list V6-PREFIX
> !
>
> Best regards
>
> Thomas
>
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