- Blue, 1500 points or more
1.) What is the difference between summarizing routes using the aggregate-address command and simply advertising a supernet using the network command?
network 10.32.80.0 mask 255.255.254.0
aggregate-address 10.32.80.0 255.255.254.0
2.) If I redistribute static routes into BGP according to a route map, is it true that, barring any other filters, all BGP neighbors will receive the static routes?
If the answer is yes, why would anyone have the following config?
router bgp 65xxx
redistribute static route-map ADV.REMOTE.SUMMARY
neighbor 10.x.x.x route-map ADV.REMOTE.SUMMARY out
route-map ADV.REMOTE.SUMMARY permit 10
match ip address REMOTE.SUMMARY.NETS
ip access-list extended REMOTE.SUMMARY.NETS
permit ip host 172.22.0.0 host 255.255.240.0
permit ip host 172.27.0.0 host 255.255.240.0
Thanks in advance...
If the requirements are met, then i dont see a difference except that the prefix could be adverised with as-set
But most of the time you would have a set of subnets downstream whereas you want only the summary to be advertised. In this case to use the network statement, you would actually require some sort of static route (say to null0) for the supernet to get advertised.
2. you are right. With the configurations listed, the route-map seems redundant and may have been added just as a precautionary measure so that no one accidentally advertises another prefix via network statement or other means.