Switching

hi everybody!let say we have 3 switches with 4 vlans, running pvst+. switches have to connected by dot1q trunk only.I read somewhere dot1q requires cst so how we connect switches running pvst+ by dot1q trunk?thanks a lot!

I have a case open with tac, but if anyone has an idea why my ios upgrade failed, I would be most grateful. Original config booted from sup-bootflash:, I moved the IOS to disk0: and updated config to boot systemd dis0:filename.Now 6509 comes up to r...

Can a router have 2 IP addresses?What is the meaning of secondary IP address? can a router have secondary IP address?

hi everybody!Does dot1q not support pvst?cisco switches by default operates in pvst mode. So how can dotq trunk appears to support pvst?thanks a lot!

hi everybody!Could anybody please forward me the good link on cst? thanks a lot!

Hi GuysI have configuered my devices with the following ntp commandntp server 10.20.20.21 source GigabitEthernet0/0but when I check followingsh ntp status Clock is unsynchronized, stratum 16, no reference clocknominal freq is 250.0000 Hz, actual freq...

I have a couple HSRP related questions.ScenarioWe have recently moved into a data centre providing us with 2 ethernet links to the internet. They are running HSRP on both of their switches, and both switches are in "active" state and are isolated fro...

Can anyone tell me what's required to have a linux system boot from a kickstart server on another network?The system we are trying to build is several hops away from the kickstart server.I'm assuming my bootp packets are being dropped at the local ro...

Hi Experts,Jus small query about ACL last field.#access-list <acl id> permit/deny source-adds wild-mask desti-adds wild-mask operator eqCan anybody tell what is the last field 'eq'If above syntax (command) wrong also Regards,Naidu.

What is the best practice to use when configuring port channel between Catalystr 3750G switch stack and WLC 4402 / 4404 Wireless Lan Controllers?a) Negotiate to LACP b) Negotiate to PAgP or c) Hard-code to Port Channel without any negotiation. Any po...

Does anyone know if it is possible to creat an acces list with DNs entries instead of IP address/mask?

We have several HP printers the repeatedly loose their IP address. They are models 8000N and 8150N.I don't see any logs messages indicating that they are loosing their connection to the switch. I don't see any interface errors. We have tried several ...

hey folksany one can help to how to check routing module (MSFC) in 6513 switch is working fine or not. Specifically any idea about checking packet drops on MSFC interfaceThanks