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Update to suppress-map used for BGP aggregate-address not taking

Mark Williams
Level 1
Level 1

Hi all.

I'm stumped with this one.

If I update a suppress route-map used to unsuppress some of the more specifics under a aggregate, I have to do a hard reset to get the more specific advertised.   I need to do a soft reset so I don't cause a BGP flap.

Config;

Router A;

router bgp 2000

  aggregate-address 10.30.0.0 255.255.0.0 suppress-map BGP_SUPPRESS

!

route-map BGP_SUPPRESS deny 40

match ip address prefix-list TEST1_DONT_SUPPRESS

!

route-map BGP_SUPPRESS deny 50

match ip address prefix-list TEST2_DONT_SUPPRESS

!

route-map BGP_SUPPRESS permit 100

!

ip prefix-list TEST1_DONT_SUPPRESS seq 100 permit 10.30.131.0/24

ip prefix-list TEST2_DONT_SUPPRESS seq 100 permit 10.30.132.0/24

On the neighbor router

;

routerB#show ip bgp neighbors 10.7.64.7 received-routes  | in 10.30

*>i10.30.0.0/16     10.7.64.7                0    100      0 i

*>i10.30.131.0/24   10.7.64.7                0    100      0 40000 i

*>i10.30.132.0/24   10.7.64.7                0    100      0 40000 i

Add new subnet to router A to not be suppressed

router A

route-map BGP_SUPPRESS deny 60

match ip address prefix-list TEST3_DONT_SUPPRESS

!

ip prefix-list TEST3_DONT_SUPPRESS seq 100 permit 10.30.133.0/24

The only way to make this route appear on the neighbors is to do a

clear ip bgp *

But I want to do a soft clear.

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