Hi all,
I'm using frr-7.2.1-s3, I found command of `show ip bgp sum` shows ipv6 neighbors in ipv4 address-family, like this.
Is this a bug?
```
dut-testbed(config-router)# do show ip bgp ipv6 summary
IPv6 Unicast Summary:
BGP router identifier 10.1.0.32, local AS number 65100 vrf-id 0
BGP table version 13313
RIB entries 12007, using 2158 KiB of memory
Peers 3, using 61 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
fc00::76 4 64600 3606 6686 0 0 0 00:20:06 6002
fc00::7a 4 64600 3605 6686 0 0 0 00:20:06 6002
fc00::7e 4 64600 3605 6686 0 0 0 00:20:05 6002
Total number of neighbors 3
dut-testbed(config-router)# do show ip bgp ipv4 summary
IPv4 Unicast Summary:
BGP router identifier 10.1.0.32, local AS number 65100 vrf-id 0
BGP table version 12008
RIB entries 12011, using 2158 KiB of memory
Peers 8, using 163 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.0.0.57 4 64600 3610 3414 0 0 0 00:20:17 6002
10.0.0.59 4 64600 3610 3417 0 0 0 00:20:17 6002
10.0.0.61 4 64600 3610 3417 0 0 0 00:20:17 6002
10.0.0.63 4 64600 3610 3414 0 0 0 00:20:17 6002
fc00::72 4 64600 6 18 0 0 0 never Idle
fc00::76 4 64600 3609 6690 0 0 0 00:20:15 NoNeg
fc00::7a 4 64600 3609 6690 0 0 0 00:20:15 NoNeg
fc00::7e 4 64600 3608 6689 0 0 0 00:20:14 NoNeg
Total number of neighbors 8
dut-testbed(config-router)# address-family ipv6
dut-testbed(config-router-af)# neighbor fc00::72 activate
dut-testbed(config-router-af)# do show ip bgp ipv4 summary
IPv4 Unicast Summary:
BGP router identifier 10.1.0.32, local AS number 65100 vrf-id 0
BGP table version 12008
RIB entries 12011, using 2158 KiB of memory
Peers 8, using 163 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.0.0.57 4 64600 3617 3421 0 0 0 00:20:39 6002
10.0.0.59 4 64600 3617 3424 0 0 0 00:20:39 6002
10.0.0.61 4 64600 3617 3424 0 0 0 00:20:39 6002
10.0.0.63 4 64600 3617 3421 0 0 0 00:20:39 6002
fc00::72 4 64600 6 18 0 0 0 never Idle
fc00::76 4 64600 3616 6697 0 0 0 00:20:37 NoNeg
fc00::7a 4 64600 3616 6697 0 0 0 00:20:37 NoNeg
fc00::7e 4 64600 3616 6697 0 0 0 00:20:36 NoNeg
Total number of neighbors 8
dut-testbed(config-router-af)# do show ip bgp ipv4 summary
IPv4 Unicast Summary:
BGP router identifier 10.1.0.32, local AS number 65100 vrf-id 0
BGP table version 12008
RIB entries 12011, using 2158 KiB of memory
Peers 8, using 163 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.0.0.57 4 64600 3618 3422 0 0 0 00:20:41 6002
10.0.0.59 4 64600 3618 3425 0 0 0 00:20:41 6002
10.0.0.61 4 64600 3618 3425 0 0 0 00:20:41 6002
10.0.0.63 4 64600 3618 3422 0 0 0 00:20:41 6002
fc00::72 4 64600 3212 20 0 0 0 00:00:01 NoNeg
fc00::76 4 64600 3617 6698 0 0 0 00:20:39 NoNeg
fc00::7a 4 64600 3616 6698 0 0 0 00:20:39 NoNeg
fc00::7e 4 64600 3616 6698 0 0 0 00:20:38 NoNeg
```