I have 2 isp links at site A terminating on a L3 switch.I wud be running ospf on this end to ideally loadbalance n utilise both links in somewhat equal proportion.
Now this A location has to access services at location B & anything which is outside of these specific service would go to another device C at same location as B, to be moved over to internet.I need to ensure that the ospf on loc A does understand this as well and acts accordingly.Can anyone help me with a sample config?
Also, wud the return data coming from B or C towards A keep back the same path as it went out or would it arrive thru any of the 2 links towards A.Wud the isp be able to control this incoming path towards loc A or can we do it in anyway?
NB: there wont be any bgp on our end...bgp would be probably inside the providers pe-ce cloud.Any suggestions i should give to them?
I had put somewhat similar query sometime back in this forum albeit the B & C location...thats y posting it again.That time Giuseppe had helped me in understanding the original post.Appreciate if anyone or Giuseppe can help on this!!!
Thanks in advance.
>> if i enable ospf on switch at site Y on a vlan with 2 ports having the provider link termination, it would engage in loadsharing the traffic outwards.
only if you make an etherchannel with the provider you can use both links.
My notes have been made under the hyphotesis of two distinct L3 links.
if the two links are l2 links bundled together they are a single L3 link and load balancing is made by etherchannel using exor of IP SA and IP DA
>> how good is running gre tunnel from Site Y to Site X?
I would use it only to carry non ipv4 traffic between the two sites : in an L3 MPLS VPN service you don't need to use GRE tunnels.
Hope to help