Hi all, I'm currently testing a vPC Border Gateway (vPC BGW) design to interconnect two data centers with a legacy architecture, aiming to extend only Layer 2 services. Each data center has a pair of Nexus 9000 switches configured as vPC peers. Is it...
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One of my core Nexus 7010 switches, which is connected via vPC, is generating the log ‘%L2FM-5-L2FM_CFS_SEND_FAILED: cfs send failed’ approximately 10-15 times per second. This is causing issues across the entire network, including access losses. Is ...
Hi allI'm trying to upgrade a 3048 NEXUS from 7.0. to 9.3.9 and im sure the upgrade path is correct, but i keep getting this:Compatibility check is done:Module bootable Impact Install-type Reason------ -------- -------------- ------------ ------1 yes...
I'm trying to setup a Nexus C93180YC-FX3 as parent switch for a N2K-C2248TP-E-1GE FEX (client want to re-use the N2K FEX)According to the compatibility matrix, this is a supported combination.https://www.cisco.com/c/dam/en/us/td/docs/Website/datacent...
Hello,I'm working on a Nexus 9K setup where I have a VRF configured, and I'm trying to provide internet access to devices inside VLAN 10 (which is part of VRF 10). Here's what I did:Nexus is connected to a router with IP 10.10.10.2 (acts as next-hop ...
Hi everyone,I'm currently studying VXLAN and trying to understand its benefits and real use cases. I’ve built a lab with the following setup:A FortiGate firewall connected to the internet.Two Nexus 9K Core switches connected with vPC for redundancy.T...
Resolved! VPC-Port-Channel-packet flow-SVI
Hi, everyone, Hope you are good> I'm working with two Nexus 9K switches configured with vPC.Both switches (core-core L3) (TOR-TOR L2) are connected to an access switch via a port channel (one link from each Nexus). The access switch has VLANs 10 and ...
Hello, We are seeing repeated authentication failure logs on our Cisco Nexus N9K-C93180YC-FX3 device, and we're trying to understand what they mean. Example log entries: show accounting log Tue Jul 22 13:53:02 2025:type=update:id=::PAM:user= Authenti...
Hi everyone,I'm configuring a vPC keepalive link between two Cisco Nexus switches and have a few questions regarding VRFs, point-to-point links, and management interface usage.Here’s my current setup and understanding:I connected a dedicated interfac...
Hi everyone,I’m working with a setup that includes two Cisco Nexus switches configured with vPC. Both switches are connected to a FortiGate firewall using Port-Channel 40 on each core switch, and the Port-Channels are configured as Layer 3 interface...
In the BGW back-to-back model design, is it possible to have a route server? If yes, where should the route server be connected? I am planning to use Cat8Kv as the route server. Can I deploy one route server in DC1 and another in DC2? Once the underl...
Resolved! vPC - Peer-switch feature use case
Hi,I've got a question around the use "peer-switch" feature in vPC.I understand that "peer-switch" feature allows the vPC switches within a vPC domain to appear as a single switch to the remote devices for STP by using the vPC logical system-MAC as t...
Hello everyone, Hope you are fine.I'm trying to understand the behavior of vPC and Spanning Tree when I do NOT configure a port-channel between a Layer 2 switch and a pair of vPC Nexus peers.I’ve done a lab, but I still can’t fully grasp what’s happ...
Resolved! vxlan development stages
Hi, can someone please advise how the vxlan technology was developed? I know initially is using multicast with bgp, now the latest one seems it is using mp-bgp evpn. The configuration is totally different. Please advise, thanks.
We have vxlan multisite topology in CML. When we create l2vni between site and start ping from client in site 1 to client in site 2 we get 100% CPU LOAD on BGW because on arp loop.APR request goes from the 1st site bgw to the 2nd site bgw, then the ...
