| Solution |
Diagram:
set-distance-local: This command can be used for routes that are configured under ‘configured network’ for the BGP config ‘config router bgp’.
This command is handy when you have ‘set backdoor enable’ under ‘config network’ and want to set up a different local distance. The default value for ‘set distance-local’ is 200, however, this can be changed with this command.
More information regarding the BGP backdoor can be found in the article linked below:
Technical Tip: Use BGP backdoor to prefer IGP over EBGP
FGT1 # show router bgp
config router bgp
set as 65001
set router-id 172.16.10.1
config neighbor
edit "20.0.0.3"
set remote-as 65003
next
end
config network
edit 1
set prefix 172.16.10.0 255.255.255.0
next
end
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Network 172.16.20.0/24 is learned via two different routing protocols i.e., BGP and RIP.
The network learned via BGP is installed in the routing table because of the lower distance and the network learned via RIP is installed in the database.
FGT1 # get router info routing-table database | grep 172.16.20.0/24
B *> 172.16.20.0/24 [20/0] via 20.0.0.3 (recursive is directly connected, port3), 00:01:24, [1/0]
R 172.16.20.0/24 [120/2] via 10.0.0.2, port2, 00:53:18, [1/0]
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After enabling ‘set backdoor enable’ under ‘config network’, BGP network 172.16.20.0/24 has moved to the database because the default distance-local of 200 is set. The same network learned via RIP is installed in the routing table.
config router bgp
config network
edit 1
set prefix 172.16.10.0 255.255.255.0
next
edit 2
set prefix 172.16.20.0 255.255.255.0 <-- This is a local route that has a backdoor enabled.
set backdoor enable
next
end
FGT1 # get router info routing-table database | grep 172.16.20.0
B 172.16.20.0/24 [200/0] via 20.0.0.3 (recursive is directly connected, port3), 00:01:08, [1/0]
R *> 172.16.20.0/24 [120/2] via 10.0.0.2, port2, 00:46:01, [1/0]
Before enabling the backdoor, the BGP network 172.16.20.0/24 had a distance of 20, and it was changed to the default distance-local 200 after enabling the backdoor command.
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To prefer the BGP route over RIP, the distance current set to 200 must be changed. This can be done using the command ‘set distance-local x’.
config router bgp
set distance-local 65
end
FGT1 # get router info routing-table details | grep 172.16.20.0
B 172.16.20.0/24 [65/0] via 20.0.0.3 (recursive is directly connected, port3), 00:00:32, [1/0]
FGT1 # get router info routing-table database | grep 172.16.20.0
B *> 172.16.20.0/24 [65/0] via 20.0.0.3 (recursive is directly connected, port3), 00:00:40, [1/0]
R 172.16.20.0/24 [120/2] via 10.0.0.2, port2, 01:26:13, [1/0]
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