We have 20+ Frame connected sites ranging from 256k to 2 - banded 1.55MB T1's. Occasionally I have a need to determing what/who is using all the Bandwidth at a specific site. We have Cisco 1750's, 2600's and 3600's running various versions of IOS's. Can this be acoomplished by connecting to the router and issuing a command? Thanks in advance.
If you are looking for specific hosts and their traffic ouput, look into using the "ip accounting" command. Be careful due to the increased cpu load on the router that is doing it but it will help you.
The ip accounting command records the number of bytes (IP header and data) and packets switched through the system on a source and destination IP address basis. Only transit IP traffic is measured and only on an outbound basis; traffic generated by the router access server or terminating in this device is not included in the accounting statistics.
IP accounting will do this for you but will eat up LOTS of CPU / memeory. Another option is to create ACL's that permit every host in the subnet and then apply them to the interface. You can then see who is using the bandwidth. EG:
ip access-list ex BoopSrc
permit ip host 22.214.171.124 any
permit ip host 126.96.36.199 any
permit ip host 188.8.131.52 any
permit ip any any !(just to be safe!)
now make another ACL that permits on destination:
ip access-list ex BoopDst
permit ip any host 184.108.40.206 !etc...
ip access-group BoopSrc in
ip access-group BoopDst out
sho ip access-list Boop
you should get a count of how many times each line has matched. You can leave these ACL's in the config to make testing really fast and easy, but you probably don't always want them on the interface as it just wastes resources...
The other option is NetFlow, but this is probably an overkill.... See my earlier reply to a thread titled "Stealing Bandwidth" or something similar...
Thanks for the reply. Acutally, IP Accounting was the command I was looking for. However, I will look at the ACL option due to the CPU concern. Question: What is the router command to view the current CPU load? Thanks again. I'm impressed with this forum.
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.