Seems as-path prepending as the best approach. > From: [email protected] > To: [email protected] > Date: Sun, 5 Jul 2009 12:13:56 -0500 > Subject: [OSL | CCIE_RS] v10, vol1, task 11.18 (page 337-338 PG) > > Another goofy one? > > TASK 11.18 - R1 should add these 4 loopbacks. When they hit other routers, > they should appear as if originated by AS 65003 > > 92.1.80.1/24 > 92.1.81.1/24 > 92.1.82.1/24 > 92.1.83.1/24 > > PG Solution: > > ! R1 (AS60000) > Access-list 21 permit 92.1.80.0 0.0.3.255 > > Route-map task18 permit 10 > Match ip addr 21 > Set origin egp 65003 > Route-map task 18 permit 20 > > What PG solution gets you: > > *> 92.1.80.0/24 150.100.12.1 0 0 60000 e > *> 92.1.81.0/24 150.100.12.1 0 0 60000 e > *> 92.1.82.0/24 150.100.12.1 0 0 60000 e > *> 92.1.83.0/24 150.100.12.1 0 0 60000 e > > AS has not been modified? Just looks like origin was flipped to egp. > > So rather do it just using path prepending: > > R2(config-router)#do sh ip bgp | i 92.1.8 > *> 92.1.80.0/24 150.100.12.1 0 0 60000 65003 i > *> 92.1.81.0/24 150.100.12.1 0 0 60000 65003 i > *> 92.1.82.0/24 150.100.12.1 0 0 60000 65003 i > *> 92.1.83.0/24 150.100.12.1 0 0 60000 65003 i > > Yes? No? > > >
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