Category Archives: Uncategorized

Packet Pushers Show 210 – SPB Implementation Fundamentals

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Back in October 2014, Dominik & myself spoke on an episode of the Packet Pushers podcast about Shortest Path Bridging & Avaya’s implementation of SPBm.

I had almost forgot about this until I was looking around for some information & discovered that Michael McNamara had mentioned it on his blog too.

https://blog.michaelfmcnamara.com/2014/11/avaya-spb-implementations-packet-pushers/

http://packetpushers.net/podcast/podcasts/show-210-spb-implementation-fundamentals/

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VLANS & port modes on Juniper EX series

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root> configure

CREATE THE VLAN

root# set vlans MYVLAN vlan-id 100

ADD THE VLAN TO AN ACCESS PORT

root# set interfaces xe-0/0/0 unit 0 family ethernet-switching port-mode access vlan members MYVLAN

root# commit

ADD THE VLAN TO A TRUNK (TAGGED) PORT

root# set interfaces xe-0/0/0 unit 0 family ethernet-switching port-mode trunk vlan members MYVLAN

root# commit

 

Password Recovery on Cisco 1800 series

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Every now & then I have to reset or reconfigure an older Cisco device that I come across in my day to day. This is just for me personally to remember. If it helps you too, then your welcome! 😉

Please see the regular process to reset the password on 1841 Router below,

  • Use the console to connect to the 1841
  • Use the power switch in order to turn off the router, and then turn the router back on
  • SEND BREAK within 60 seconds of power up in order to put the router into ROMMON
  • Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash

This step bypasses the startup configuration where the passwords are stored

  • Type reset at the rommon 2> reset

The router reboots, but ignores the saved configuration.

  • Type no after each setup question, or press Ctrl-C in order to skip the initial setup procedure.
  • Type enable at the Router> prompt.
  • You are in enable mode and should see the Router# prompt.
  • Type copy startup-config running-config in order to copy the nonvolatile RAM (NVRAM) into memory.

Important:

Do not type copy running-config startup-config or write. These commands erase your startup           configuration.

  • Type configure terminal
  • Type #enable secret <password> in order to change the enable secret password.
  • Type config-register #config-register 0x2102
  • Type write memory or #copy running-config startup-config in order to commit the changes
  • RELOAD

Refer:

http://www.cisco.com/en/US/products/hw/routers/ps221/products_password_recovery09186a0080094773.shtml