Showing posts with label Cisco. Show all posts
Showing posts with label Cisco. Show all posts

Sunday, December 14, 2014

Using Sonera 6rd IPv6 with Cisco IOS router

Sonera recently started offering 6rd tunnels to their customers in Finland. Based on this Comcast example it was easy to get Sonera 6rd up with Cisco 892 running IOS 15.5(1)T.

Thursday, December 04, 2014

Cisco EEM applet to monitor and repair broken DHCP leases

Dirty hack to renew DHCP lease on Cisco 881 if Internet access is lost. This can happen when Cisco has valid DHCP lease from ISP and then cable modem or DSL router is power cycled but switch between Cisco and upstream device keeps link-state up. Options are either to fix it manually (pull cable / change config / reboot Cisco) or hack something like below. I'm also pinging over VPN tunnel to Intranet as it would be shame to break this due Level 3 and Google blocking ICMP which might happen one day.

Sunday, November 16, 2014

Cisco CSR1000v 3.13 finally working on VMware ESXi 5.1

After many, many months of waiting Cisco finally managed to build new version of CSR1000v 3.13 that is compatible with VMware ESXi 5.1. Another quiet release without release notes. As with earlier 3.13 versions this new 03.13.01S build is available only in OVA format without purchasing license (csr1000v-universalk9.03.13.01.S.154-3.S1-ext.ova). Not to worry as you can extract ISO image and even BIN images if needed for upgrading older install from OVA.

If you're coming from 3.12 or older with eval license (which allowed creation of eval license locally) you'll need new licenses. Usual two month license is available from Cisco portal but it's extra step compared to 3.12. 


Another difference is performance levels for unlicensed and eval licensed modes. Unlicensed 3.12 is 2,5Mbit/s, eval licensed 3.12 is 50Mbit/s, unlicensed 3.13 is 0,1Mbit/s and eval licensed 3.13 is 10Gbit/s.


Saturday, September 27, 2014

Cisco CSR1000v 3.13 crashes on VMware ESXi 5.1

Initial version of Cisco CSR1000v 3.13 (csr1000v-universalk9.03.13.00.S.154-3.S-ext) was broken and kept crashing while booting on VMware ESXi 5.1, but apparently does work on ESXi 5.5. Cisco has silently replaced it with 3.13S0a version (csr1000v-universalk9.03.13.00a.S.154-3.S0a-ext) without providing any release notes or even updating filedates. Which is exactly as broken as old one - stuck in infinite reboot loop.

Download is here, but for some reason for 3.13 only OVA packaged one is available after free registration. If you need ISO simply unpack OVA with 7zip and use ISO you can find inside for install.

And then it will fail. Perhaps something to do with crazy nested virtualization CSR uses. Thanks guys.

Wednesday, September 04, 2013

Execute BGInfo when IP address changes

Updates IP on your BGInfo managed desktop background image when new network connection is detected. Notices also Cisco AnyConnect VPN connections. Import XML file with SchTasks.exe.

Sunday, December 16, 2012

Automate login to Cisco and Aruba controller based Guest WLAN

Tired of logging manually to Cisco or Aruba controller based guest wlans with captive portal?