Hi, I recently upgraded the firewall hardware that was connected to a switch. After upgrading the firewall (IPs are the same), I couldn't ping from the inside interface on the firewall to the switch. I couldn't also ping from the switch to the in...
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Forum Posts
Resolved! Port-channel questions?
Does port-channel load balance at all by default or do I actually have to configure it? Also, let's say I have a HA redundant set up, (2 access switches connecting to 2 core switches). Should I configure each access switch ports that connect to each...
Resolved! vrrrp skew time ?
Hello Guys, Can anybody explain vrrp skew time ? Thanks
Hi all, I've been using the Catalyst 3850 for a few years now, but only now I am in the situation where I'm asked to stack a mix of UPOE with POE switches. Does anybody know or tested a scenario like this ? My plan is to bulild a stack of: 1 x W...
I'd like to consult with you with an issue I've been encountered over our Production environment. We have 6509E VSS Core Switch, running EIGRP. There are 2 N5K's, that run VPC all of the vlans behind the Nexus, and they are the L3 termination point (...
I was looking at a show proc CPU history on a 3850 (IOS-XE) switch and I see short CPU spikes. Average CPU is not really high, between 40% and 50%. Also, I was reading this about NX-OS : The Cisco NX-OS operating system takes advantage of preempt...
I'm trying to understand the role of the interface internal cpu. We are seeing drops on it and want to analyze this further. To see the drops, we do apply the following command : show platform qos queue stats internal cpu. This is a reduced an...
I have a WS-C3850-48P 03.06.03E cat3k_caa-universalk9 INSTALL that shows the behavior of it's MAC address table being flushed every ~65 seconds. The 3850 has 2 2960 stacks hanging off it on Ten1/1/3 and Ten1/1/4. I did a monitor session...
Hello, I installed Packet Tracer on Xubuntu 16.04 amd64. It didn't start at first, but it started after I installed the qtmultimedia5-dev package. At start I get an error message: "Cannot load ExApp. The executable file name or location may be inc...
in my organization i want to load balance duel WAN link also want to ensure Fail over with IP SLA. can you give some idea how it can be down. what i did better i will explain firstly ........i did load balancing with PBR and its working fine. for ex...
Resolved! tagged or untagged frames
I have few questions: when we put this command, dot1q tag native which results in the drop of untagged frames. If we put all the ports in diff vlans where should untagg frames will arrive. Thanks
Resolved! port speed wont negotiate
hello, i have moved a server from a 3750 switch to a 3850 switch. it only auto negotiates to 100mb full. i want it to negotiate to 1000mb like the rest of my servers which are all 1gb. here is the config switchport mode access switchport nonegoti...
Dears, I wanna propose a core distribution, server farm,and access layer switches also Datacenter firewall for the client I want know to how I can calculate the throughput requirement for all these layers. for example what I want to know is the ...
Resolved! VSS 4500 License issue
Hello, We have a quad-sup VSS and we had to make a RMA for one supervisor. When we installed the new supervisor we see the following message: ********************* CAUTION ************************ * ...
Hello All, I am trying to configure c9500-40x-E pair with IOS 16.08.1a for stackwise but I do not see the command line is supported. Could some one help me if i am missing some details and fix. Regards Sharath Karpur
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