Just asking around here. Any advice.
Given:
- Branch office using 2xADSL equivalent (cable modem) lines.
- 90% of the traffic goes to central cluster which is relatively near (40ms).
- Traffic to cluster should be fastest and most flexible.
I try tofind the best solution.
- Given that the local addresses may change daily (they dont at the moment, except after power failures every couple of months) a normal IPIP tunnel is out (requires IP Addres for local end).
- So far I am with having one PPTP link per physical link, always established from the branch office.
The question is - what dto do with the traffic?
So far:
- I use PCC to distribute local traffic
I Think the best / most flexible I can come up with is this:
- No local traffic to internet, all goes to the cluster and then out from there. THe time delay is not so significant.
- Use opne PPTP link per physical uplink.
- Use ECMP then to distribute packets between PPTP links.
THe main advantage is that if one link fails, ECMP automatically takes that out (interface is off). All other scenarios have limitations or get really complex in this case. Only disadvantage - but one I can live with - is that in this case the queue bandwidth limits are totally wrong (so too much traffic gets queued maximum).
Anyone a better idea? This seems to be the easiest thing to do.