Switching

What would be the best method to prevent vlan hopping or inter vlan communication? I have an 881 router with a trunk port that is connected to a 2960 which has a additional trunk port connected to a 2nd 2960 switche and then it is trunked to a third ...

I'm having a problem with DHCP snooping on a 3560. The switch is running 12.2(40)SE, and is acting as a DHCP server for one VLAN only. A second VLAN has its DHCP server external to the switch. If I turn on DHCP snooping for both VLANs, I only get the...

Hi all, im after some advice re vlan gateway's per switch!I'm currently implementing some new vlans, we have 2 core switches (4500's) that are connected via an etherchannel which our access switches connect into. One being the VTP master (if thats re...

Alright, so I got a 2926g that was recycled so I am trying to set this up for our LAN. I have reset about 30+ routers in the last few years but I cannot seem to get this switch to cooperate... The usual procedure of accessing rommon with ctrl+break w...

When I give the FA0 this command:!interface FastEthernet0ip address 172.24.0.240 255.255.255.192no ip route-cache!I get a response that because it is not part of a stack or has IP routing turned on, it will not let me reconfigure the IP address of th...

I think this may be an easy question.....if I'm trunking a switchport  that is connected to a VM instance, will I see interface errors on that trunk port? (input errors, CRC errors, etc)Thanks--Brian

I'm thinking about using UDLD on our fiber links. I know that it is important that UDLD detects a uni-irectional link before spanning-tree converges. We have default timers for our spanning-tree configuration, which from what I understand, will give ...

I have 2 Servers which need to have a heartbeat connection between themselves. When I connect a Dlink hub between them the heartbeat works fine. But when I connect them across two server farm switch in the same L2 VLAN the setup does not work. The he...

Dear all,I'm currently investigating what the VRF-lite limitations are on the following platform:The setup consists of two of these devices dedicated for the DMZ infrastructure.Cat6509-E:----------------4 * WS-X6148-GE-TX1 * WS-SUP720-3B1 * WS-X6748-...

hello everyone, i have been searching the forums for quite some time and can't get the answer i'm looking which embarasses me, i have a fair understanding of networking, yet this is my first experience in the cisco/business networking area.what i am ...

Hello Experts,I have a query on running VPC with two Nexus 7ks.1>  VPC peer-link is made up of 2 dedicated 10g links. Can I have a peer-link , where link 1 is on one type of line card ( say N7K-M132XP-12L ) AND link 2 is on another type of line card ...