Switching

Looking for recommendations as we have a compatibility issue with an AMD U200 40G card which is broken out to 4x SFP+ connections and then a QNA into a Cisco QSFP+ on the C9336C-FX2 switch. We are trying to disable auto-negotiation on the Cisco switc...

Hello,I am looking for the performance data of WCCP on the Catalyst C9500-48Y4C switch. We are considering deploying this switch in a configuration where it will redirect all traffic to our proxy, with no additional workload. During peak usage, we an...

Hello everyone,I'm working on a fairly hefty project and I'm completely lost. It feels like I had a solid handle on what I was doing, however I followed different suggestions for different things and I've jumbled myself up so much I don't know where ...

We have dot1x configured on some ports on our C9300s. Lately we have been seeing when we restart the CA server for patching, as it restarts all the dot1x ports drop out because they aren't authenticated until the server comes back on and the ports ar...

I have a Cisco C9500-24Y4C that I setup a few days ago by creating a user and adding some vlans. I unplugged the switch and moved it to a separate desk to do further setup and testing with other devices. When I plugged it in the switch does not allow...

Hi there,I'm a little confused as to what some of the fields on the output of a 'show interfaces' for an ethernet interface. Am I right in thinking that:'overruns' would show frames dropped that are coming in from a server (or other device) physicall...

Hi,have here a 4-way hybrid stack. For any reason, the Unit 2 was lost and the switch was rebooted. All of our WLAN APs are connected here and the WebEx connection was gone in the middle of a conference with an important customer.How to fix that?Than...

I'm encountering an issue with VLAN segmentation on my network. I have 10 VLANs, where some need to communicate with each other while others should remain isolated. For example, I have VLANs 10, 20, and 30:-VLAN 10 (in Static) should communicate with...

Hi, in view of the occasion i would like to ask if someone knows if there exists any mechanism to automatically shut down a Layer2 fibre port ( which is also member of a LACP-Channel ) with rising FCS-/input errors, such as error-disable at a thresho...

Hi community,when configuring QinQ Tunneling on WS-C3560CX IOS 15.2(7)  & C9300-48P-A IOS 17.6.5, please what is the default STAG ethertype: 0x8100 or 0x88A8 that the devices will use? if the STAG QinQ Tuneling ethertype standard is 0x8100, please ho...

Catalyst9300で、spanning-tree vlan で複数設定しているvlanの中から一つ削除するため、以下のコマンドを投入したのですが、configから削除したいvlanが残ったままで、困っています。投入コマンド：no spanning-tree vlan 1111上記投入前に、vlan 1111 を先に削除してしまったが、削除する前にspanning-tree の削除対象のvlanを削除すべきだったのか、教えてください。また、現状のまま（spanning-tree vlanに1...

Hello everyone!So I have a network with many switches and VLANs and everything is beautiful and cool except for this one switch (let's call it SW1) I can't telnet to from another VLAN, it doesn't even respond pings. Every switch here has an administr...

%PLATFORM_PM-6-MODULE_INSERTED: SFP module inserted with interface name Twe1/0/23%PLATFORM_PM-6-DIFFERENT_MODULE_INSERTED: Warning: SFP module inserted in to the interface Twe1/0/23 differs from the previously inserted one. The port's fec configurati...