Users Guide

Usage
Information
This command helps detect routing loops, based on the AS path before it starts advertising routes. To
configure a neighbor to accept routes use the neighbor allowas-in command. The no version of
this command disables sender-side loop detection for that neighbor.
Example (IPv4)
OS10(conf-router-bgp-102)# neighbor 3.3.3.1
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-bgp-neighbor-af)# sender-side-loop-detection
Example (IPv6)
OS10(conf-router-bgp-102)# neighbor 32::1
OS10(conf-router-neighbor)# address-family ipv6 unicast
OS10(conf-router-bgp-neighbor-af)# no sender-side-loop-detection
Supported
Releases
10.3.0E or later
show ip bgp
Displays information that BGP neighbors exchange.
Syntax
show ip bgp [vrf vrf-name] ip-address/mask
Parameters
● vrf vrf-name — (OPTIONAL) Enter vrf and then the name of the VRF to view route information
corresponding to that VRF.
● ip-address/mask — Enter the IP address and mask in A.B.C.D/x format.
Default Not configured
Command Mode EXEC
Usage
Information
None
Example
OS10# show ip bgp 1.1.1.0/24
BGP routing table entry for 1.1.1.0/24
Paths: (1 available, table Default-IP-Routing-Table.)
Received from :
3.1.1.1(3.3.3.33) Best
AS_PATH : 100
Next-Hop : 3.1.1.1, Cost : 0
Origin INCOMPLETE, Metric 0, LocalPref 100, Weight 0, confed-external
Route-reflector origin : 0.0.0.0
When you filter routes by IP addresses, if the system does not find a match, it displays the following error
message:
OS10# show ip bgp 40.40.40.0/24
%Error: Prefix does not exist.
Supported
Releases
10.3.0E or later
show ip bgp dampened-paths
Displays BGP routes that are dampened or nonactive.
Syntax
show ip bgp [vrf vrf-name] dampened-paths
Parameters None
Default Not configured
Layer 3 637