On 18/12/2007, at 7:42 AM, Paul - Talk Talk wrote: > We have upgrade our lease line from 4mb copper to 10mb fibre which > meant we > had to change our router. > > The old router was a Cisco 2620 and the new Router is a Cisco 1841. > > > > Between the Cisco Router and our Cisco 3550 layer three switch is a > bandwidth management box, which is an Allot NetEnforcer AC-402. > > > > On the old the old set-up using the Cisco 2620 everything worked fine. > > > > On the new set-up with the Cisco 1841 we are seeing a lot of CRC > errors > until the whole thing falls over. > > > >> From our side nothing has changed except the router which was >> supplied by > the ISP. > > > > We did find out that the FE0/0 interface on the Cisco 1841 was set > to auto, > but this has now been set to Full Duplex 100mb which matches the Allot > NetEnforcer. > > > > Taking the NetEnforcer out and connecting to the Cisco 1841 directly > to the > Cisco 3550 stops the errors, but as said before switching back to > the Cisco > 2620 also stops the errors. > > > > Any help would be appreciated. > > > > Kind Regards > > Paul Stainton > > > _____ > > << ella for Spam Control >> has removed 620 Spam messages and set > aside 0 > Newsletters for me > You can use it too - and it's FREE! www.ellaforspam.com > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/
On one particular PC I have cannot auto negotiate and cannot be set to 100/full without producing errors. I have to run it in 100 half. At least this one is only a PC. Its got a Broadcom NIC. My suggestion would be, if you can spare two ports on the switch, to create a VLAN and stick the two interfaces that would normally connect directly to each other into that VLAN. Otherwise, try different cables between the two, set the port to 100/half, and try different interfaces if you can. I may have other issues with the PC above, such as a dodgy cable. I havnt gone so far to test that out yet as its bandwidth requirements are low, 100/half does just fine. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
