Switching

I'm currently testing out DHCP Snooping.I've set up a lab environment consisting of a standalone Catalyst 3750X 15.0(2)SE7 switch uplinked to a Catalyst 3560 15.0(2)SE7 switch that has my legitimate DHCP server plugged into it. I've made the uplink i...

Hi, I am trying to understand how my customer's setup is working properly. I told them it would not work, but they proceeded to buy the unmanaged switch and it is now working. So embarrassing. Here is a brief diagram of the setup. Phone ---- Unmanag...

Hi all, I will upgrade my 4500-E without lose client services (using ISSU), someone can help me to find the right procedure ? this is the actual release :03.06.03 this is the release to put in the device :03.06.04 I found this white paper http://ww...

Hi, I am posting here after raking my brain and the internet for a possible answer short of opening a TAC case. So as in the diagram attached I have a pair of 6500 and a pair of N7K talk over a vlan on non vpc trunks between the 4 switches, althoug...

Hi ,it has been many days trying to establish vpn remote access based on certificates. i have cisco royuter 1900 and im trying to use it as remote access vpn based on certificate not based on preshared key. actually i followed a video to help me in c...

Hi, We're trying to connect our Nexus 9372 to an IBM V9000. We've got the QSFP cable connected, I would expect to at least see L1 connectivity but the port is showing as not connected. Very simple config for now - interface Ethernet1/49  descripti...

Hi,   I have a problem with etherchannel in WS-C3650 :   In my LAN network, I have two C3650 in stackwise mode for Core and three C3650 in stackwise mode for access modul, when I apply a etherchannel configuration I see this error :   Apr 27 12:32:04...

I'm looking into 10gig switches was surprised to see their shared buffers seem to be lower than 1gig models. For example, a nexus 3000 series has a smaller buffer than a 4948. Would I be correct in assuming that on a 10gig switch the amount of tra...

Hello All, I have inherited a fairly old and badly designed network infrastructure, I have been pushing for capex to replace it all. So I am hoping that someone can confirm that this would be a good catalyst for my directors finally pull the trigger...

Hi Friends, We are planning to Replace our Core Switch (C3750- 2 Nos, configured with HSRP) with Nexus N9K-C9372TX (2 Nos). Existing core switch (C3750) configurations are mentioned below. 01. Network Attached Storage (Net App) Configuration. NAS ...

Hi Whether below config on catalyst 4500 switch is ok ? port type is access. Do I need to remove switchport nonegotiate command or its ok ? interface <<interface>> description <connected to firewall>  switchport private-vlan mapping <<primary_vlan>> ...

Hello, I have an older Catalyst 2960G switch which I would like to connect redundantly to my two upstream Nexus 5672UP switches. For that purpose I would like to connect Gi0/47 of the catalyst to Eth1/33 of the first Nexus 5672UP and Gi0/48 of the ca...