Configuring Passive Peering - Dell S4048T Configuration Manual

Update source set to Loopback 0
Peer active in peer-group outbound optimization
For address family: IPv4 Unicast
BGP table version 52, neighbor version 52
4 accepted prefixes consume 16 bytes
Prefix advertised 0, denied 0, withdrawn 0
Connections established 6; dropped 5
Last reset 00:19:37, due to Reset by peer
Notification History
'Connection Reset' Sent : 5 Recv: 0
Local host: 200.200.200.200, Local port: 65519
Foreign host: 100.100.100.100, Foreign port: 179
Dell#
To verify that fast fall-over is enabled on a peer-group, use the show ip bgp peer-group command
(shown in bold).
Dell#sh ip bgp peer-group
Peer-group test
fall-over enabled
BGP version 4
Minimum time between advertisement runs is 5 seconds
For address family: IPv4 Unicast
BGP neighbor is test
Number of peers in this group 1
Peer-group members (* - outbound optimized):
100.100.100.100*
Dell#
router bgp 65517
neighbor test peer-group
neighbor test fall-over
neighbor test no shutdown
neighbor 100.100.100.100 remote-as 65517
neighbor 100.100.100.100 fall-over
neighbor 100.100.100.100 update-source Loopback 0
neighbor 100.100.100.100 no shutdown
Dell#

Configuring Passive Peering

When you enable a peer-group, the software sends an OPEN message to initiate a TCP connection.
If you enable passive peering for the peer group, the software does not send an OPEN message, but it
responds to an OPEN message.
When a BGP neighbor connection with authentication configured is rejected by a passive peer-group, Dell
Networking OS does not allow another passive peer-group on the same subnet to connect with the BGP
neighbor. To work around this, change the BGP configuration or change the order of the peer group
configuration.
Border Gateway Protocol IPv4 (BGPv4) 236