Steve, I believe the 3 T1 are multiplexed using multilink PPP using an Adtran router if I remember correctly.
Is there any way to tell if this PPP bundle is causing out of order packets or other issues? Thanks, --Jim > > One off the wall idea - the site had two T1's (3.0 Mbps) multiplexed > > via PPP before. The problems seem to start close to around when they > > added a third T1 (again via PPP) for a total of approx 4.5Mbps. Is > > there any chance that this could cause issues - seems to be a pretty > > standard provider setup... > > How are the three T1s load-balanced? Multilink PPP or just using three > paths that the routers see between each other? When there are just > three paths seen between the routers, the routers will often cache which > destination goes over which circuit so the packets are transmitted > across the same circuit in proper order for each destination on the > other end. Multilink PPP sends the packets in more of a round-robin > fashion, where one of the packets could get caught behind a larger > packet on say the first T1 while two other packets from the same session > make it across the other two T1s quickly. This would cause out-of-order > packets. Although that case is usually confined to slower speed links > (< 768Kbps) and is called serialization delay. _______________________________________________ Wireshark-users mailing list Wireshark-users@wireshark.org http://www.wireshark.org/mailman/listinfo/wireshark-users