I have this problem that I need a stepwise procedure for. We have this outsource support contract. They do not seem to understand Cisco products and I do not have access to the systems to figure this out myself. I have CCNA level experience (yet to take the test) but am a little rusty with a couple of years lag. I know that given an IP and a MAC you can find the port. The general network design though is obtrusive because most switches are not routed, they are daisy chained from one port to another. The majority are 5000/5500 series switches. This is what I know,
1. traceroute gets me to the core switches.
2. I need to get to the local switch the system is plugged into.
How do I step out of the core to the next switch?
1. show ip interface can show me where the packet is leaving the core based on information of the traceroute right?
2. show cdp neighbor should tell me the next switch in line towards the server, but it may be daisy chained off that switch to another 1 or 2 more switches.
3. Once I identify the switch it is on, I can use either show IP arp or show cam mac_addr to find the port it is connected to right?
Then I can once againt look at the interface to verify the mac and any errors as well as the duplex settings (which is what they were to verify and change). It took 21 hours before we got anywhere with this and I need to find a troubleshooting resolution until they can get their documentation of the network up to par.
4. Also, is there anything such as an arp ping or arp traceroute?
If all your switches are running 6.x CatOS code then you can take advantage of l2trace utility. You can use the l2trace command to display the Layer 2 path taken by the packets that start at a specified source address and end at a specified destination address.
Refer this URL for command reference and usage guidelines:
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.