From: NITIN NITIN (ccie_study_123@yahoo.com)
Date: Sun Aug 26 2007 - 16:06:34 ART
Beaiuse using As-set you inherit properties of your subnetworks of AGGREGATE
if you dont want any option from subnetworks to be inherited use advertise map along
Regards
"Riapolov, Bradley" <BRiapolo@wm.com> wrote:
Without AS-SET (notice that Local-Pref is missing from sh ip bgp):
############################################
Rack1R1(config-router)#do sh run | b rou
router bgp 1
no synchronization
bgp log-neighbor-changes
network 3.3.3.0 mask 255.255.255.0
network 3.3.4.0 mask 255.255.255.0
neighbor 1.1.1.2 remote-as 2
no auto-summary
Rack1R2(config-router)#do sh run | b rou
router bgp 2
no synchronization
bgp log-neighbor-changes
aggregate-address 3.0.0.0 255.0.0.0
neighbor 1.1.1.1 remote-as 1
no auto-summary
Rack1R2(config-router)#do sh ip bgp
BGP table version is 4, local router ID is 1.1.1.2
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 3.0.0.0 0.0.0.0 32768 i
*> 3.3.3.0/24 1.1.1.1 0 0 1 i
*> 3.3.4.0/24 1.1.1.1 0 0 1 i
Now with AS-SET (Local-Pref automagically appears):
##############################################
Rack1R2(config-router)# aggregate-address 3.0.0.0 255.0.0.0 as-set
Rack1R2(config-router)#do sh ip bgp
BGP table version is 5, local router ID is 1.1.1.2
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 3.0.0.0 0.0.0.0 100 32768 1 i
*> 3.3.3.0/24 1.1.1.1 0 0 1 i
*> 3.3.4.0/24 1.1.1.1 0 0 1 I
This archive was generated by hypermail 2.1.4 : Sat Sep 01 2007 - 11:32:13 ART