BGP Step 2 - Add the announcement network

Example: Add the announcement network

Reference model:

• Switch model name: AS7816-64X
• Edgecore SONiC version: SONiC-OS-Edgecore-SONiC_20200116_051623_ec201904_128
  
  

Procedure: Enter Vty shell and BGP ASN

Switch#1
sonic# configure terminal 
sonic(config)# router bgp 65101 
sonic(config-router)# network 192.168.1.0 mask 255.255.255.0 
sonic(config-router)# end

Switch#2
sonic# configure terminal 
sonic(config)# router bgp 65102 
sonic(config-router)# network 192.168.2.0 mask 255.255.255.0 
sonic(config-router)# end

Note: This configuration example says that network 192.168.1.0/24 and 192.168.2.0/24 will be announced to all neighbors.

Note: (Optional)Redistribute routing entires such as local network, static route (refer to this article)

Step 1. Check network result

sonic# show ip bgp ipv4
BGP table version is 2, local router ID is 1.1.1.1, vrf id 0
Default local pref 100, local AS 65101
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
*> 192.168.1.0/24   0.0.0.0                  0         32768 i
*> 192.168.2.0/24   10.10.10.3               0             0 65102 i

Displayed  2 routes and 2 total paths

Note: Network 192.168.1.0/24 Next Hop 0.0.0.0  this is local network

Step 2. Save the setting.

sonic# write
Note: this version of vtysh never writes vtysh.conf
Building Configuration...
Configuration saved to /etc/frr/zebra.conf
Configuration saved to /etc/frr/bgpd.conf
Configuration saved to /etc/frr/staticd.conf