From the blog.

Managing Digital Racket
The more I tune out, the less I miss it. But that has presented me with some complex choices for a nuanced approach to curb
Complexity – My Friend, My Enemy
Over my years of network engineering, I've learned that the fewer features you can implement while still achieving a business goal, the better. Why? Fewer

GroupStudy.com CCIE-LAB List – Best of 1/10/2008 – show ip bgp regexp + switchport trunk pruning vlan + Mobile IP vs. LAM + Automating Catalyst Ping Tests With Macros

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

My gleanings from GroupStudy.com posts I’ve read over the last couple of days.

  • Use the “show ip bgp regexp” command to test-drive a regular expression you may be using to do BGP AS path matching. It’s a beautiful thing, and I don’t know how I missed this command before.
  • You can define on a trunk what VLANs are eligible for pruning with “switchport trunk pruning vlan“. Again, how did I miss this? Man, I really need to go through all the blueprint technologies command by command.
  • Apparently “Local Area Mobility” and “Mobile IP” are different technologies, despite white papers that might lead you to believe otherwise. We know for sure that Mobile IP is NOT being tested on the CCIE R&S lab exam, because Marilio Gorito says so deep in this thread. But LAM (“ip mobile arp”, and “redistribute mobile” being key commands) is a question mark. LAM shows up in NMC DOiT Scenario 20, an IE covers it in their Vol.II workbooks as well.
  • This is one I was going to research, and hadn’t got around to it. You know how you can use a tcl script to automate your pings for a reachability check? It’s been a nuisance to me that you couldn’t do the same thing on a 3550 or 3560. While there’s no tcl interpreter on the Cats, there are macros. Check this out – it’s a beautiful thing.

    CAT1#conf t
    Enter configuration commands, one per line. End with CNTL/Z.
    CAT1(config)#macro name PINGIT
    Enter macro commands one per line. End with the character ‘@’.
    do ping 148.49.1.1
    do ping 3.3.3.3
    do ping 4.4.4.4
    @
    CAT1(config)#macro global apply PINGIT

    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 148.49.1.1, timeout is 2 seconds:
    !!!!!
    Success rate is 100 percent (5/5), round-trip min/avg/max = 28/30/32 ms
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
    !!!!!
    Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
    !!!!!
    Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

    CAT1(config)#