fix the show ip bgp network command

[arlakshm]

Signed-off-by: Arvindsrinivasan Lakshmi Narasimhan [email protected]

What I did

Fix the issue sonic-net/sonic-buildimage#7935

How I did it

Add the default namespace option to DEFAULT_NAMESPACE instead of None

How to verify it

Run the command on VS
show ip bgp network and show ipv6 bgp network

admin@vlab-01:~$ show ip bgp network  -h
Usage: show ip bgp network [OPTIONS] [<ipv4-address>|<ipv4-prefix>]
                           [bestpath|json|longer-prefixes|multipath]

  Show IP (IPv4) BGP network

Options:
  -n, --namespace TEXT  Namespace name or all  [default: ]
  -h, -?, --help        Show this message and exit.
admin@vlab-01:~$ show ip bgp network | more

BGP table version is 6405, local router ID is 10.1.0.32, vrf id 0
Default local pref 100, local AS 65100
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*= 0.0.0.0/0        10.0.0.61                              0 64600 65534 6666 6667 i
*=                  10.0.0.63                              0 64600 65534 6666 6667 i
*>                  10.0.0.57                              0 64600 65534 6666 6667 i
*=                  10.0.0.59                              0 64600 65534 6666 6667 i
*> 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
admin@vlab-01:~$ show ip bgp network 100.1.0.30/32

BGP routing table entry for 100.1.0.30/32
Paths: (1 available, best #1, table default)
  Advertised to non peer-group peers:
  10.0.0.57 10.0.0.59 10.0.0.61 10.0.0.63
  64600
    10.0.0.59 from 10.0.0.59 (100.1.0.30)
      Origin IGP, valid, external, best (First path received)
      Community: 5060:12345
      Last update: Tue Jul 27 22:20:03 2021

admin@vlab-01:~$ show ipv6 bgp network | more
BGP table version is 6407, local router ID is 10.1.0.32, vrf id 0
Default local pref 100, local AS 65100
Status codes:  s suppressed, d damped, h history, * valid, > best, = multipath,
               i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes:  i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*= ::/0             fc00::7a                               0 64600 65534 6666 6667 i
*=                  fc00::7e                               0 64600 65534 6666 6667 i
*>                  fc00::72                               0 64600 65534 6666 6667 i
*=                  fc00::76                               0 64600 65534 6666 6667 i
*> 2064:100::1d/128 fc00::72                               0 64600 i
*> 2064:100::1e/128 fc00::76                               0 64600 i
*> 2064:100::1f/128 fc00::7a                               0 64600 i
*> 2064:100::20/128 fc00::7e                               0 64600 i


admin@vlab-01:~$ show ipv6 bgp network 2064:100::20/128
BGP routing table entry for 2064:100::20/128
Paths: (1 available, best #1, table default)
  Advertised to non peer-group peers:
  fc00::72 fc00::76 fc00::7a fc00::7e
  64600
    fc00::7e from fc00::7e (100.1.0.32)
    (fe80::cde:f4ff:feff:c74e) (prefer-global)
      Origin IGP, valid, external, best (First path received)
      Community: 5060:12345
      Last update: Tue Jul 27 22:20:07 2021

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)

[smaheshm]

[yxieca]

@arlakshm can you create a separate PR for 202012 branch? This change cannot be cherry-picked cleanly.

[prsunny]

@arlakshm , this you may want to create a separate PR for 201911 as files have diverged a lot. @abdosi for viz