Just a quick post today, and my usual apology for not posting more frequently.
If, like me, you find yourself doing ISR IOS XE upgrades, you realize that although it can be a quick process there is always room for improvement.
Today, while upgrading 15+ ISR 4451 CUBE routers, I decided to quickly “notepad script” my upgrade commands. For reference I am using an SFTP server for this upgrade but the plan works for FTP or TFTP if you wish.
My quick and dirty notepad script looks like this…
copy sftp: bootflash:
IP ADDRESS OF SFTP SERVER
USERNAME for SFTP SERVER
PASSWORD for SFTP SERVER
! (for Enter)
A quick copy and paste and the process has started. Once the copy is successful, a second quick and dirty script will change the boot path and then reboot your router.
boot system bootflash:IOSXEFileName
There is nothing special here, and there are far more elegant solutions but this works for me and hopefully it can work for you!
If you follow this blog regularly (it says a lot about you, but that is for a different post) you know that last year, 2016, I took my first crack at the CCIE Collaboration practical lab exam. I took it in RTP (North Carolina) and it royally kicked my ass.
It is now nearly 12 months later and I am preparing for my second attempt. This year I have built my own lab instead of renting rack space from INE (who I believe I still owe money to from last year, but so far they haven’t come to collect). I am taking the exam on April 25 in RTP once again and while I am going to give it my very best shot, I am taking it because I honestly have no desire to attempt the written again and if I wait more than 12 months to attempt the lab my current written will be invalidated.
I’ll probably have more posts as the weeks draw closer, but the most important thing to note so far is that it is getting cheaper to purchase your own lab hardware. With Cisco coming out with the 44xx and 43xx ISR G3 routers the 29xx ISR G2 routers, which are still the hardware of choice for the current lab iteration, have become cheaper in the secondary market. I’m not saying that building a lab is cheap, by any means, but at least more folks now have that option. In my case, my lab contains the following…
3825 – PSTN/BB Router. This is running CME for PSTN emulation. I am running PRIs to all 3 of the site routers; T1 PRIs the US sites and an E1 to the international site, I am using fractional PRIs to save on DSP resources.
Dell Server 72GB Ram, Dual Xeon, SSD USB Drives (new addition) – This started life as a very weird CS-24TY but has now been revamped and runs all of my lab VMs easily.
2921 for HQ (2) PVDM-3 16 DSPs (this is actually enough for homogeneous video conferencing).
2821 for Site-B PVDM-2 64 DSP (good for voice only) (Generally Site-B is H.323 and possibly CUBE, a 2821 will run 15.1.x code which is not perfect but is close enough for that location). If I am asked switch/conference video at Site-B, I am S.O.L.
2811 for Site-C (CME)… I actually just ordered a 2911 and ISM-SRE-300 module to replace the 2811 as there are some serious differences between 15.1.x CME and 15.2.x and later CME i.e. CME 9/10.5/etc. I have a CUE module in the 2811 but I made the decision to spend money and get something closer to actual.
9971 phones as required (cheap enough used) and 7962 phones instead of 7965s as the differences between the two SCCP options are not that great and it saves some money.
In the back-end of the lab I also have a 3750 switch that I am using as a layer 3 WAN cloud instead of Frame Relay (which only matters in the QoS sections) and a 2960G PoE switch which I am using for phone power. I know the syntax is different but I cannot yet justify spending money or effort to aquire PoE EHWICs.
I also have another Dell Server which hosts my “production” 11.5 CRS infrastructure which I can use for BB SIP calls as needed.
My setup is not perfect but perfect honestly costs to much. The fact that I can come down to my basement and practice whenever I want without having to reserve pricey rack space makes my setup perfect for me.
How about you? Do you have a lab? What are you running? Any suggestions? Comments? Questions? Leave them below!