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Category: Cisco

Firmware updates on C9130AXI-B & friends

The GUI based updates suck and never work. In place upgrades suck and never work. I can’t imagine trying to do this with an HA scenario. I do an outage-requiring Continue Reading…

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Key-based SSH authentication to IOS XR devices

Are you used to doing this in Cisco IOS? and what you end up with is an easy and obvious local user who can authenticate over SSH using their key Continue Reading…

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NCS5501 port bundling, switching, and MC-LAG

Just got a new pair of NCS5501 SE’s, and per my article here, they are upgraded to what is currently IOS XR 6.2.25. Next, if you’re coming from Arista, you Continue Reading…

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NCS5501 / IOS XR 6.2 and BGP in a VRF

An update to this article; there’s a method to get around the issue I ran into.  It is not well documented, and TAC knows nothing about it in my experience, Continue Reading…

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Cisco NCS5501-SE Initial Deploy / Upgrade

This is just a little diary entry for my first install of some NCS5501-SE devices.  I continue to edit it as I find more and more that is broken on Continue Reading…

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SCP’ing an IOS image to a Cisco 2960XR stack

Well, obviously you need SSH access to do this.  You also need your IOS device to be set up as an SCP server.  If you aren’t set that way, you’ll Continue Reading…

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Cisco 2960XR IOS upgrade from usb flash is super slow

So I decided to upgrade a 2960XR stack via flash instead of TFTP mostly just because I could.  What I wasn’t prepared for is how incredibly slow it went, and Continue Reading…

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OSPFv3 between Arista and Brocade or Cisco

Similar to my article about Cisco and Brocade not wanting to interact with each other without a very specific configuration, you’ll likely run into the same issue if you’re trying Continue Reading…

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Trouble with OSPFv3 between Brocade & Cisco

Note: in my articles, any time I give a config example, parts you need to replace *should* be in red text. Here’s the CliffsNotes version of this article for those Continue Reading…

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Got a Cisco router that doesn’t seem to want to boot off your saved configuration?

I had a Cisco 1811 router that I could happily change the configuration on, write mem and reload and it would just never actually use that config. Turns out it Continue Reading…

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