I am trying to reduce the routing table to our PE's which are currently 3750ME's. The 3750ME's only come with 128MB of DRAM so I am keen to reduce the size of the routing table amongst other things. Is there an equivalent to the aggregate-address ipv4 address family (within bgp) command for vpnv4 routes? Essentially I would like to filter, summarise or add default routes facing the PE's where possible. Being able to perform this level of granularity per vrf instance would be ideal.
I had read somewhere that vpn4 automatically summarises between P's and PE's but I wasn't 100% confident on the source of this information.
there's no auto summarization, in fact your P routers shouldn't be running BGP and they shouldn't see any VPNv4 prefixes. There's no aggregate-address command under "address-family vpnv4", you put it under "address-family ipv4 vrf x". In other words, you summarize routes coming in from CE's in a VRF. Use "summary-only" keyword. It will result only in a summary vpnv4 route sent to other PE's
loadbalancing is one of the more complex items in hardware forwarding. of course we have talked about it many years on cisco live (id 2904) with ever incrementing more detail. and there is the support forum article on loadbalancing.
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