Switching

I have a site where non-STP loop can happen very easily - I won't bother you with details.non-STP loop in my environment is when you interconnect one wall jack with another which is equivalent to interconnecting two switch ports on same switch.Since ...

Looking for advice on a problem we have. We have a building with the WAN link etc. There is a separate building which is connected via a point to point wireless link.We have Cisco 2960 switches at either end of the wireless link. The switch is divide...

Hello,Is 802.1v supported on Cisco L3 switches (3560, 3750, 3560-X, 3750-X and 3850)?I didn't find anything related of 802.1v on theses switches at their data sheets and other sources.The results that I saw is reference with switch Metro Ethernet 460...

I discovered when troubleshooting slowness problem that the Output queue  from show interface command on all 2960 interfaces was  0/0 (size/max). I know the default output queue is 0/40. Has anyone seen this before? Do you think the output queue 0 wi...

Hi, I'm studying for the CCNA, and am trying to learn and experiment with OSPF in packet tracer. I am having trouble with setting up a ABR to advertise a summary route for area 0 to another router in area 1. Lets say I have: R1:router ospf 1network 1...

I'm having trouble setting up a two-radio system. We have a location on a subnet and everything local functions correctly. But we also have a remote site that has an antenna and that remote site can communicate with the main location except with RTP....

We are currently upgrading our network infrastructure and we have two cisco WS-C3560G-24TS switches operating with HSRP as a collapsed Core/Distribution layer. I would like to replace these with two switches we can stack and do away with HSRP, but un...

What does the status 'Open' really mean? I read the documentation that says 'the pair of wires is open', which doesn't explain much.

Two nights ago I replaced my sonicwall with a cisco 2811.  Everything was great, untill the next morning.  Around 9:30am internet stopped.  I was able to ping out by ip but not name.  I logged on to the dns server and found that I could ping internal...

Hello,I have a question regarding VSS I thought I'd post here.  According to Cisco, "If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up, the VSS will transition to the du...

Hi All I use ping to check the speed of Layer 3 network. In addition to this, What tools can be used to detect low speed of layer 2 and 3 ?  Thank you ! Showip

Can this cause dot1x authentication failure. When I put dot1x on my switch i get the same ports that authenticate initially but within 25 hours they fail authentication. When I remove dot1x I get continuous "LINK-3-UPDOWN & LINEPROTO-5-UPDOWN" on the...

Hi I just cant ping the HQ router here. Tried to ping from a PC from different VLANs, no use. For example, when i ping from PC0 to 192.168.2.3 (which is the F1/0 interface of the HQ router) it fails and outputs this message from the cmd:   Reply fro...