I'm quite new regarding NEXUS 9000 series switch so bear with me please. I had a strange behaviour regarding the port-channel. I have 2 NEXUS9K switches connected over VPC so it acts like one logical switch. On this setup I have aporximatly 10 Port-channels towards the switch. When I was testing this setup I shut down all interfaces on both Nexus switches and then turned them on again.
The results was that all Port-channels went back up again after the interfaces were UP except for one on the secondary NEXUS switch that was stuck in (STP set port state failure), and the physical interface was errdisabled.
The log showed : "%STP-2-SET_PORT_STATE_FAIL: Port state change req to PIXM failed, status = 0x12 [fu hashtable key not present] vdc 1, tree id 0, num ports 6, ports state FW D, opcode MTS_OPC_PIXM_SET_MULT_CBL_VLAN_BM_FOR_MULT_PORTS, msg id (-945035772), rr_token 0x47ABE604"
On the first Nexus switch the physical interface went normaly up and Port-channel was UP. Well all fine I suppose , the traffic should still flow through first Nexus switch. But when I tested the reachability and other kind of network traffic, sometimes devices over this port-channel were reachable and othetimes they were down. It looked like the switch was still trying to pass traffic over the secondary Nexus switch. Could this happend because from the perspective of the switch that was connected to both Nexus switches both interfaces were active ?
When I shut/no shut the Port-channel it went UP on the secondarty switch and everything started to work normaly.
Could this be a BUG , or is this a normal behaviour or something else.
Cisco DNA Center version 2.2.2.x includes the features and improvements that
New intelligence provides an easy, gradual, and complete adoption of SD-Access. Faster Cisco DNA Center set-up saves time and effort.
When using Cisco cellular modules with a SIM card an APN must be provided. The APN cannot be stored in the SIM card and is supplied by your SIM card provider. Cisco cellular software contains a database of well-known APNs based on the country and ...
Cisco 3850: IOS-XE/Firmware Upgrade
This procedure is aimed at Cisco 3850 switch ONLY.
IOS-XE Bundle Mode is not covered.
9300, 9500 (vanilla & high-performance), ISR 1k, ISR 4k and ASR is not covered.
Listen: https://smarturl.it/CCRS8E46Follow us: twitter.com/ciscochampionsIt’s been several years since the release of Cisco DNA Center, and it’s matured into a complete network management system, an automation and orchestration engine, an AI/ML analy...
The 2021 IT Blog Awards, hosted by Cisco, is now open for submissions. Submit your blog, vlog or podcast today. For more information, including category details, the process, past winners and FAQs, check out: https://www.cisco.com/c/en/us/t...