T1 traffic causing periodic freezesLocked
We have two relatively nearby buildings, both are token-ring networks, connected via a full T1 which is split between voice and data. The T1 is linked to our networks through Andrew Bridgeports. Internet is served by a local ISP, connected via a fract T1 and comes in to a Cisco 1600, to a Watchguard firewall, then on to a Cisco 2500.
There have been problems with large data xfers between the buildings causings all data communications to come to a screaming halt. Thelarge data transfer itself generally appears to continue, altho is normally cancelled.
This is causing problems for a contractor that is connecting to us via dialup to a local ISP, then using VPN to gain access to us through a fract T1 from theISP to us, then connects to a Citrix server in our other building on the otherside of the T1 in question. This has been a semi successful venture to replace the PCAnywhere method implemented before my employment here, and is bypassing our firewall and leaving a gaping backdoor open. Performance of the Citrix server has been excellent with exception to uptime, where it has fallen short of PCAnywhere.
I am also guessing that this has been causing our problems with our downtown office connecting to our mailserver here.
Does this sound like a basic bandwidth issue? ..or possibly a routing issue? Could it be configured in a way to limited the allowed bandwidth of any single transfer?
Could WINS be a contributing factor? We currently have a WINS server in both buildings, both with what appear to be high query failure rates. The local server receives 10 times the querries of the server downtown, which is probably a result of DHCP assigning it as the primary WINS server. I’m considering configuring the downtown clients WINS accordingly and disabling the Computer Browser server to limit WINS broadcasts. Is this worth persuing?