Category: Cisco
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Controlling Cisco ACI with Ansible
It’s no secret that I’m a Cisco fanboy. I started networking on Cisco kit and honestly got all of my foundations from studying for Cisco certs. So it should come as no surprise that I like finding excuses to automate Cisco in interesting ways. This was my first experience with automating Cisco ACI(Application Centric Infrastructure)…
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Simple Interface Policing In IOS-XR (ASR9000)
First I’ll create a simple policy that will match on 2gbps. The policy map in IOS-XR is a dream, it lets you specify speed in bps, kbps, mbps, or gbps…stupid simple. policy-map 2gig class class-default police rate 2 gbps conform-action transmit exceed-action drop ! ! end-policy-map So class “class-default” is a built in class that…
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Cisco Ifindex Persistent Between Reboots
So if a line card fails in a Cisco device and the chassis is rebooted, then the ifindex for all or some of the interfaces may suddenly change. To combat this enter the following command: snmp-server ifindex persist This command will globally fix the ifindex of interfaces. Here’s the Cisco link.
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Cisco ASR 9000 Power-module failure condition raised
We were recently doing some chassis replacements and I got my final ASR 9000 chassis in. We were able to successfully upgrade it and were letting it do its customary hardware burn in when we notice some odd messages hitting the log: RP/0/RSP0/CPU0:Nov 8 13:44:57.220 CST: pwrmon[381]: %PLATFORM-PWRMON-2-MODULE_FAILURE : Power-module 0/PS0/M0/SP failure condition raised RP/0/RSP0/CPU0:Nov…
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VLAN 1002 – 1005 Unusable In Cisco Switches
I was recently working with a WISP doing some network upgrades, when I hit an issue I hadn’t stumbled upon before. Their previous engineer had set them up on VLANs 1001, 1002, 1003, and 1004. I tried swapping them over to using a Cisco 4948(which is a great switch) in their core, but as it…
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Install Cisco Virtual Wireless LAN Controller On Proxmox
This is quick and dirty instructions for myself in the future…sorry if they are short. First, locate the vWLC image you’d like to use. I chose MFG_CTVM_8_9_111_0.iso. Create a new VM in your virtualization platform of choice. Here I used proxmox. I created it with 2GB of RAM, two CPUs, 32GB of storage, and it…
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ASR9000/IOS-XR OSPF Fun With MTU
I’m going to start by saying IOS-XR has some pretty cool features, I mean just look at the addition of “commit”. It does, however, have some quirks that can confound you, especially when you are migrating from one architecture over to the ASR9000 series. In particular, I’m going to look at the OSPF implementation. Here’s…