Switching

Hi , i got a 2921 , and i am working to configure it as a failover router with 2 ISP , the failover works great , but the computer have not internet , i can ping the gateway , but i cannot ping nothing more , even the IP configured in the other inter...

How to resolve following vPC error :- Compatibility check failed for speed,   thanks

Hello,I can't find any documentation on whether the following configuration is supported.  I'm connecting a 2248PQ to a Nexus 5672UP via a 12 fiber MPO cable with a FET-40G on each end.  I know I have to breakout the 40G ports on the switch into 4x10...

Yesterday I attached three SiriusXM radios to a stack of 3750s. The radios were/are working great, on ports Gi5/0/24, 27, and 29.This morning I have a bunch of errors filling the log:Mar 24 08:13:34.198: %SW_MATM-4-MACFLAP_NOTIF: Host 76c2.5e30.1599 ...

Is it possible to pass layer 2 traffic across a layer 3 link between a Catalyst 4500 and Catalyst 6500.  I basically have OSPF connection between the 2 devices but need to extend the same subnet across both devices. I don't have any more physical con...

why route for reserved multicast address don't show up in sh ip mroute? is reserved multicast address route propagation limited to the given broadcast/nonbroadcast network only? i.e. assume followings scenario. assume PIM-SM is enabled on all routers...

Hi All, I have cisco 4900M series core switch as we have installed X2-10base-SR module for MM fiber.For long rang  we have brought X2-10base-LR module for single mode fiber. After installing the module in core switch its showing in switch inventory d...

can any body tell how to identify looping in layer 2?also how do identify switch interface current TX & Rx speed?

I have a 9 switch stacked and facing a high cpu with hitting 99%CPU utilization for five seconds: 98%/4%; one minute: 98%; five minutes: 94% PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process   4    13034934    560643      23250  2...

We have a system where some ports are randomly doing err-disabled during startup of a device, generally a laptop, not always the same one.For the ports we have dot1x authentication set up but not port-security. The ports are set to single host. From ...

I have Inter Vlan Routing done on my Core Switch, through which subnets are restricted to access each other, Example subnet of 10.1.23.0 cannot have access to subnet of 10.1.24.0.   Due to certain requirement i want that 10.1.23.19(Users Worskstain I...

i want to ask that can we send BPDU packet to switch which our computer is directly attached.it that possible?