[quagga]: Disable ipv4 over ipv6 and enable ipv6 over ipv4 peer group

[sihuihan88]

No description provided.

[stcheng]

@nikos-li please check @sihuihan88 patch on the configuration.

[lguohan]

for ipv4 neighbor, allowas-in 1 is in address-family block, for ipv6 neighbor it is outside, is this intentional?

[lguohan]

as comments.

[nikos-github]

Everyone should be providing output from their Unit Testing ;-)

[sihuihan88]

After the fix:

 bgp router-id 10.1.0.32
 bgp log-neighbor-changes
 no bgp default ipv4-unicast
 bgp graceful-restart
 bgp bestpath as-path multipath-relax
 network 10.1.0.32/32
 network 192.168.0.0/27
 neighbor BGPSLBPassive peer-group
 neighbor BGPSLBPassive remote-as 65432
 neighbor BGPSLBPassive passive
 neighbor BGPSLBPassive ebgp-multihop 255
 neighbor BGPSLBPassive update-source Loopback0
 neighbor BGPSLBPassive activate
 neighbor BGPVac peer-group
 neighbor BGPVac remote-as 65432
 neighbor BGPVac passive
 neighbor BGPVac ebgp-multihop 255
 neighbor BGPVac update-source Loopback0
 neighbor BGPVac activate
 neighbor 10.0.0.57 remote-as 64600
 neighbor 10.0.0.57 description ARISTA01T1
 neighbor 10.0.0.57 activate
 neighbor 10.0.0.57 allowas-in 1
 neighbor 10.0.0.59 remote-as 64600
 neighbor 10.0.0.59 description ARISTA02T1
 neighbor 10.0.0.59 activate
 neighbor 10.0.0.59 allowas-in 1
 neighbor 10.0.0.61 remote-as 64600
 neighbor 10.0.0.61 description ARISTA03T1
 neighbor 10.0.0.61 activate
 neighbor 10.0.0.61 allowas-in 1
 neighbor 10.0.0.63 remote-as 64600
 neighbor 10.0.0.63 description ARISTA04T1
 neighbor 10.0.0.63 activate
 neighbor 10.0.0.63 allowas-in 1
 neighbor fc00::72 remote-as 64600
 neighbor fc00::72 description ARISTA01T1
 neighbor fc00::76 remote-as 64600
 neighbor fc00::76 description ARISTA02T1
 neighbor fc00::7a remote-as 64600
 neighbor fc00::7a description ARISTA03T1
 neighbor fc00::7e remote-as 64600
 neighbor fc00::7e description ARISTA04T1
 maximum-paths 64
 bgp listen range 10.154.239.128/26 peer-group BGPSLBPassive
 bgp listen range 192.168.0.0/27 peer-group BGPVac
!
 address-family ipv6
 network fc00:1::32/128
 neighbor BGPSLBPassive activate
 neighbor BGPVac activate
 neighbor fc00::72 activate
 neighbor fc00::72 allowas-in 1
 neighbor fc00::76 activate
 neighbor fc00::76 allowas-in 1
 neighbor fc00::7a activate
 neighbor fc00::7a allowas-in 1
 neighbor fc00::7e activate
 neighbor fc00::7e allowas-in 1
 maximum-paths 64
 exit-address-family
!


show bgp ipv4 uni
BGP table version is 0, local router ID is 10.1.0.32
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
*= 0.0.0.0          10.0.0.57                              0 64600 ?
*=                  10.0.0.61                              0 64600 ?
*=                  10.0.0.63                              0 64600 ?
*>                  10.0.0.59                              0 64600 ?
*> 10.1.0.32/32     0.0.0.0                  0         32768 i
*> 100.1.0.29/32    10.0.0.57                              0 64600 i
*> 100.1.0.30/32    10.0.0.59                              0 64600 i
*> 100.1.0.31/32    10.0.0.61                              0 64600 i
*> 100.1.0.32/32    10.0.0.63                              0 64600 i
*= 192.168.0.0/26   10.0.0.57                              0 64600 65100 ?
*=                  10.0.0.61                              0 64600 65100 ?
*=                  10.0.0.63                              0 64600 65100 ?
*>                  10.0.0.59                              0 64600 65100 ?

show bgp ipv4 uni 192.168.0.0/26
BGP routing table entry for 192.168.0.0/26
Paths: (4 available, best #4, table Default-IP-Routing-Table)
  Advertised to non peer-group peers:
  10.0.0.57 10.0.0.61 10.0.0.63
  64600 65100
    10.0.0.57 from 10.0.0.57 (100.1.0.29)
      Origin incomplete, localpref 100, valid, external, multipath
      Last update: Tue Aug 29 20:17:44 2017

  64600 65100
    10.0.0.61 from 10.0.0.61 (100.1.0.31)
      Origin incomplete, localpref 100, valid, external, multipath
      Last update: Tue Aug 29 20:17:42 2017

  64600 65100
    10.0.0.63 from 10.0.0.63 (100.1.0.32)
      Origin incomplete, localpref 100, valid, external, multipath
      Last update: Tue Aug 29 20:17:42 2017

  64600 65100
    10.0.0.59 from 10.0.0.59 (100.1.0.30)
      Origin incomplete, localpref 100, valid, external, multipath, best
      Last update: Tue Aug 29 20:17:41 2017


show bgp neighbors fc00::72
BGP neighbor is fc00::72, remote AS 64600, local AS 65100, external link
 Description: ARISTA01T1
  BGP version 4, remote router ID 100.1.0.29
  BGP state = Established, up for 00:12:39
  Last read 00:00:40, hold time is 180, keepalive interval is 60 seconds
  Neighbor capabilities:
    4 Byte AS: advertised and received
    Route refresh: advertised and received(new)
    Address family IPv6 Unicast: advertised and received
    Graceful Restart Capabilty: advertised and received
      Remote Restart timer is 300 seconds
      Address families by peer:
        none
  Graceful restart informations:
    End-of-RIB send: IPv6 Unicast
    End-of-RIB received: IPv6 Unicast
  Message statistics:
    Inq depth is 0
    Outq depth is 0
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:             3204       3204
    Keepalives:            14         13
    Route Refresh:          0          0
    Capability:             0          0
    Total:               3219       3218
  Minimum time between advertisement runs is 30 seconds

 For address family: IPv6 Unicast
  Community attribute sent to this neighbor(both)
  6402 accepted prefixes

  Connections established 1; dropped 0
  Last reset never
Local host: fc00::71, Local port: 49513
Foreign host: fc00::72, Foreign port: 179
Nexthop: 10.0.0.56
Nexthop global: fc00::71
Nexthop local: fe80::eef4:bbff:fefe:8090
BGP connection: shared network
Read thread: on  Write thread: off```