Switching

I have a 4 switch stack. Port 1 switch 3 stack cabled to switch 4 port 2 shows that it's flapping up then down. Switch 4 is a new switch I just got on an RMA for this issue. We had thought swtich 4 was bad because if I stack cable a test switch to sw...

We have 2811 routers and most are not local, some fans have started to die and we are receiving in excess of 3000 traps a day on ENV syslog.  Does anyone know of a way to kill the syslog trap for only the ENV monitor?thanks for any help.Yvon

We tried today to add a third member to a C3750 stack (WS-C3750G-24T, 12.2(25)SEE2,C3750-IPBASE-M) but we forgot to poweroff the new member before to add the new stackwise cable. The result was that all ports of the 2nd member went down.We unplugged ...

Dear all,       Is there any option to span a port channel in CAT OS?pls help me to config span in CAT OS.pls help..Regards,Ajith

My company use dmvpn point-to-multipoint to connect from HQ to banch office with OSPF.We have to migrate new ip plan for system because our DC is upgarding.we config new tunnel for  the brach router and HQ router as below.And the brach router and HQ ...

I have two 3750 switches setup in a stack configuration. The internal flash can only handle one IOS due to size limitations. The new IOS was pushed to one switch then copied to the other. I performed a "verify" on both switch flash devices and it com...

Here is the designcore 1 is at location A which consists 2 6509's running hsrp for roughly 20 vlans.. core 2 is at location B which consists of 2 6509's running HSRP for roughly 30 vlans.Location A and B are connected via 1 WAN link. With multicast r...

I will make new network in my origination so there is any standers can I flow.We have already cat 5 and cat 6 some of it. Is cat 5 support 1 gig client or I need to change to cat 6I will put Cisco 6509 in core and in access I am Confused for using Ci...

I am applying the following ACL to a vlan interface in hopes of preventing all traffic except internet and dhcp of course. I am applying it inbound and it does not seem to allow me to get out. Please advise what I may be doing incorrectly. I am worki...

Does anyone know how to configure the 1000v to span to a port-channel?  I can get it to work using a single interface but whenever I attempt to span to a port-channel no traffic is getting passed.  The port-channel is the uplink to the 3120 switch. A...

Hello All,              I have a catalyst 4507R+E switch at one of my customer sites. There are two power supplies with a rating 16A,220V ( 2800ACV) and the socket at the switch side is an industrial socket. But at the main power socket on the wall i...

Hi Experts,I have one doubt. For inter vlan routing only layer3-vlan is required, right? or any routing protocol needed? We have 20 access-layer switch wich are in different vlans. Layer3-vlans are created in core switches for the corresponding layer...