At work i have a 2801 router with advanced security image 12.4(3h)
Attached to FastEthernet0/0 is a switch and a load of subinterfaces.
Attached to FastEthernet0/1 is a docsis modem that connects to internet using PPPoE.
The router performs NAT to make sure all hosts in the network can reach internet.
Mostly this all works fine, but there are some specific sites that start a transfer, and after a random amount of data the data from the other side start coming back at longer intervals, doubling each interval.
That was the original configuration which already had the problem.
The ip tcp mss-adjust 1412 on the dialer already tackles this problem, even when using the VPN.
Just for good measure i did put it on all nat inside interfaces, and the connection went to 8MB downloaded without dieing, so i nearly cheered, but then it still died. Later tries died a lot faster again.
adjust-mss 1452 on all inside interfaces: Most sites work
adjust-mss 1452 on dialer: same as on all inside interfaces, but only on 1 interface requires the command.
This was tried and tested, it doesn't matter if it's on the inside or outside, just as long as 1 has it. Also it's 1412 because of the fact we use a VPN which eats up another set of TCP and IP headers.
Also visible in the trace is the fact we do get a lot of packets, if the packet size was a problem, there would be no packets coming in.
The packets just suddenly slow down for no apparent reason.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.