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Cabled For IEWB Volume 3

323 Words. Plan about 2 minute(s) to read this.

I spent my lunch hour and about a half-hour past when I was supposed to leave re-cabling my rack for the 4.1 Volume 3 workbook.  This is the third re-cable I’ve done since starting prep.  Compared to the other 2 ( DOiT Volume 2 and Narbik Kocharians’ Advanced Lab Workbooks), IE uses more interconnections.  I am OUT of DCE/DTE cables and V.35 serial interfaces.  OUT.  I had 6 (SIX!) spare DCE/DTE pairs before cabling today.  Maybe for my next CCIE I’ll get a hold of some RJ-45 terminated T1 WICs instead of the V.35 interfaces.  Hey – I went with what I could scrounge.  ;)  IE is also a little nuts with the switch interlinks – there are 18 of them.

I didn’t get in actual rack time to do a lab, but at least I proved out my cabling.  I turned up HDLC links for all the router-to-router serial stuff.  I verified that all the serials attached to my frame-relay switch were seeing DLCI’s.  I verified with CDP all of the ethernet uplinks between the routers and switches.  So I’m happy with that.  I should be able to get some rack time in tomorrow, now that I’m all cabled up.  Worst case, I have to tweak the FRS config some more, but I think it should be correct unless I botched the interface numbering.

I did get a teeny bit of IOS time in tonight.  I tweaked the QoS on my personal router that I uses as a firewall.  Tonight, I was playing with DSCP values and WRED, tagging different classes of traffic as it leaves my network, then watching what DSCP-based WRED does as the tagged conversations go by.  I also set up SNMP so that I could do some historical graphing of bandwidth utilization and CPU.  I am working the router a little hard with all the stuff I’ve turned on, so I thought I should keep a closer eye on it.

Ethan Banks writes & podcasts about IT, new media, and personal tech.
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