From: Yasser Aly (blackyeyes00@hotmail.com)
Date: Fri Feb 20 2004 - 15:09:57 GMT-3
Hello,
I have two questions:
1) How to verify reachability for all your routes on the 3550 switch. I
tried tclsh but the command was not accepted on it ?
2) If you rely on the procedure described below it will be misleading.
Example, if you have a routing loop for a certain route, you will have a
route in the sh ip route for the looped route, however you will not be able
to detect that it is looped and might think everything is ok if you rely
only that the route show up in the routing table.
This leads to the question: How to detect that you have a routing loop with
one of your routes ?
Regards,
Yasser
>From: "Michael Snyder" <msnyder@revolutioncomputer.com>
>
>Here's a repost of the igp grading script I wrote last year.
>
>It's for people with a rack full of 2500`s and don't have access to
>tclsh.
>
>------------------------------------------------------------------------
>--
>
>I was working on a lab this morning, and for some reason my three way
>redistribution wasn't working.
>
>After jumping router to router for 30 minutes, I thought gee I wish I
>had a command to show me every missing route.
>
>I made a script to do this; I'll walk you thru how I composed the
>script. It took me about 5 minutes.
>
>Here's some benefits of the script.
>
>1) Can't be fooled by a default route.
>2) Can't be fooled by the wrong mask size.
>3) Assumes that the route should be present.
>
>Generates output only if it's missing.
>
>
>------------------------------------------------------------------------
>--
>
>First I did a `show run | i ip address`
>
>And pasted the results to notepad from every router.
>
>
>------------------------------------------------------------------------
>--
>
> ip address 170.1.1.1 255.255.255.255
> ip address 150.50.200.1 255.255.255.0
> ip address 170.1.150.1 255.255.255.0
>
> ip address 170.1.2.2 255.255.255.255
> ip address 172.16.1.1 255.255.255.0
> ip address 172.16.3.1 255.255.255.0
> ip address 172.16.2.1 255.255.255.0
> ip address 172.16.0.1 255.255.255.0
> no ip address
> no ip address
> ip address 170.1.100.2 255.255.255.0
> ip address 170.1.150.2 255.255.255.0
> ip address 150.50.9.5 255.255.255.252
>
> ip address 170.1.4.4 255.255.255.255
> ip address 192.168.10.1 255.255.255.0
> no ip address
> ip address 170.1.100.4 255.255.255.0
> no ip address
>
> ip address 170.1.5.5 255.255.255.255
> ip address 170.1.200.5 255.255.255.224
> no ip address
> ip address 170.1.100.5 255.255.255.0
> no ip address
> no ip address
>
> ip address 170.1.6.6 255.255.255.255
> ip address 170.1.200.6 255.255.255.224
> no ip address
> ip address 170.1.100.6 255.255.255.0
> ip address 170.1.32.6 255.255.255.0
> no ip address
>
> ip address 170.1.7.7 255.255.255.255
> ip address 170.1.200.7 255.255.255.224
> ip address 170.1.24.7 255.255.255.0
>
> ip address 170.1.8.8 255.255.255.255
> ip address 150.50.4.8 255.255.255.0
> ip address 170.1.24.8 255.255.255.0
>
> ip address 170.1.9.9 255.255.255.255
> ip address 170.1.32.9 255.255.255.0
> no ip address
> ip address 170.1.15.9 255.255.255.192
>
>
>
>------------------------------------------------------------------------
>--
>
>
>Next in notepad, I did a replace all of `no ip address` with a null
>string. Then I went thru the listing deleting the empty lines.
>
>
>------------------------------------------------------------------------
>--
>
> ip address 170.1.1.1 255.255.255.255
> ip address 150.50.200.1 255.255.255.0
> ip address 170.1.150.1 255.255.255.0
> ip address 170.1.2.2 255.255.255.255
> ip address 172.16.1.1 255.255.255.0
> ip address 172.16.3.1 255.255.255.0
> ip address 172.16.2.1 255.255.255.0
> ip address 172.16.0.1 255.255.255.0
> ip address 170.1.100.2 255.255.255.0
> ip address 170.1.150.2 255.255.255.0
> ip address 150.50.9.5 255.255.255.252
> ip address 170.1.4.4 255.255.255.255
> ip address 192.168.10.1 255.255.255.0
> ip address 170.1.100.4 255.255.255.0
> ip address 170.1.5.5 255.255.255.255
> ip address 170.1.200.5 255.255.255.224
> ip address 170.1.100.5 255.255.255.0
> ip address 170.1.6.6 255.255.255.255
> ip address 170.1.200.6 255.255.255.224
> ip address 170.1.100.6 255.255.255.0
> ip address 170.1.32.6 255.255.255.0
> ip address 170.1.7.7 255.255.255.255
> ip address 170.1.200.7 255.255.255.224
> ip address 170.1.24.7 255.255.255.0
> ip address 170.1.8.8 255.255.255.255
> ip address 150.50.4.8 255.255.255.0
> ip address 170.1.24.8 255.255.255.0
> ip address 170.1.9.9 255.255.255.255
> ip address 170.1.32.9 255.255.255.0
> ip address 170.1.15.9 255.255.255.192
>
>
>
>
>------------------------------------------------------------------------
>--
>
>
>This lab uses a summary address of 172.16.0.0/22, so I chose to pull out
>the 172.16.1.1/24 routes and use the summary instead.
>
>Here's a important part, I needed a unique post-delimiter on the ends
>of the statements for text search and replace later. So I appended the
>` char to the ends of the statements by hand. Each statement begins the
>same `ip address` text, so I don't need a pre-delimiter here.
>
>
>------------------------------------------------------------------------
>--
>
>
>
> ip address 170.1.1.1 255.255.255.255 `
> ip address 150.50.200.1 255.255.255.0 `
> ip address 170.1.150.1 255.255.255.0 `
> ip address 170.1.2.2 255.255.255.255 `
> ip address 172.16.0.0 255.255.252.0 `
> ip address 170.1.100.2 255.255.255.0 `
> ip address 170.1.150.2 255.255.255.0 `
> ip address 150.50.9.5 255.255.255.252 `
> ip address 170.1.4.4 255.255.255.255 `
> ip address 192.168.10.1 255.255.255.0 `
> ip address 170.1.100.4 255.255.255.0 `
> ip address 170.1.5.5 255.255.255.255 `
> ip address 170.1.200.5 255.255.255.224 `
> ip address 170.1.100.5 255.255.255.0 `
> ip address 170.1.6.6 255.255.255.255 `
> ip address 170.1.200.6 255.255.255.224 `
> ip address 170.1.100.6 255.255.255.0 `
> ip address 170.1.32.6 255.255.255.0 `
> ip address 170.1.7.7 255.255.255.255 `
> ip address 170.1.200.7 255.255.255.224 `
> ip address 170.1.24.7 255.255.255.0 `
> ip address 170.1.8.8 255.255.255.255 `
> ip address 150.50.4.8 255.255.255.0 `
> ip address 170.1.24.8 255.255.255.0 `
> ip address 170.1.9.9 255.255.255.255 `
> ip address 170.1.32.9 255.255.255.0 `
> ip address 170.1.15.9 255.255.255.192 `
>
>
>
>
>------------------------------------------------------------------------
>--
>
>Here's the payoff. Using notepad, replace all `ip address` with `show
>ip route` Also replace our delimiting char ` with `| i not`
>
>
>------------------------------------------------------------------------
>--
>
> show ip route 170.1.1.1 255.255.255.255 | i not
> show ip route 150.50.200.1 255.255.255.0 | i not
> show ip route 170.1.150.1 255.255.255.0 | i not
> show ip route 170.1.2.2 255.255.255.255 | i not
> show ip route 172.16.0.0 255.255.252.0 | i not
> show ip route 170.1.100.2 255.255.255.0 | i not
> show ip route 170.1.150.2 255.255.255.0 | i not
> show ip route 150.50.9.5 255.255.255.252 | i not
> show ip route 170.1.4.4 255.255.255.255 | i not
> show ip route 192.168.10.1 255.255.255.0 | i not
> show ip route 170.1.100.4 255.255.255.0 | i not
> show ip route 170.1.5.5 255.255.255.255 | i not
> show ip route 170.1.200.5 255.255.255.224 | i not
> show ip route 170.1.100.5 255.255.255.0 | i not
> show ip route 170.1.6.6 255.255.255.255 | i not
> show ip route 170.1.200.6 255.255.255.224 | i not
> show ip route 170.1.100.6 255.255.255.0 | i not
> show ip route 170.1.32.6 255.255.255.0 | i not
> show ip route 170.1.7.7 255.255.255.255 | i not
> show ip route 170.1.200.7 255.255.255.224 | i not
> show ip route 170.1.24.7 255.255.255.0 | i not
> show ip route 170.1.8.8 255.255.255.255 | i not
> show ip route 150.50.4.8 255.255.255.0 | i not
> show ip route 170.1.24.8 255.255.255.0 | i not
> show ip route 170.1.9.9 255.255.255.255 | i not
> show ip route 170.1.32.9 255.255.255.0 | i not
> show ip route 170.1.15.9 255.255.255.192 | i not
>
>
>------------------------------------------------------------------------
>--
>
>Ok, lets try it on R4.
>
>I use four terminal windows, so I cut and paste to all four at once, and
>read the results when done. It's really telling when you see the same
>missing route on three of the four routers.
>
>Another thing, if route shouldn't show up on any router, replace the `i
>not` with `e not`
>
>------------------------------------------------------------------------
>--
>
>R4#
>R4#
>R4# show ip route 170.1.1.1 255.255.255.255 | i not
>R4# show ip route 150.50.200.1 255.255.255.0 | i not
>% Network not in table
>
>R4# show ip route 170.1.150.1 255.255.255.0 | i not
>R4# show ip route 170.1.2.2 255.255.255.255 | i not
>R4# show ip route 172.16.0.0 255.255.252.0 | i not
>R4# show ip route 170.1.100.2 255.255.255.0 | i not
>R4# show ip route 170.1.150.2 255.255.255.0 | i not
>R4# show ip route 150.50.9.5 255.255.255.252 | i not
>% Network not in table
>
>R4# show ip route 170.1.4.4 255.255.255.255 | i not
>R4# show ip route 192.168.10.1 255.255.255.0 | i not
>R4# show ip route 170.1.100.4 255.255.255.0 | i not
>R4# show ip route 170.1.5.5 255.255.255.255 | i not
>R4# show ip route 170.1.200.5 255.255.255.224 | i not
>% Subnet not in table
>
>R4# show ip route 170.1.100.5 255.255.255.0 | i not
>R4# show ip route 170.1.6.6 255.255.255.255 | i not
>R4# show ip route 170.1.200.6 255.255.255.224 | i not
>% Subnet not in table
>
>R4# show ip route 170.1.100.6 255.255.255.0 | i not
>R4# show ip route 170.1.32.6 255.255.255.0 | i not
>R4# show ip route 170.1.7.7 255.255.255.255 | i not
>% Subnet not in table
>
>R4# show ip route 170.1.200.7 255.255.255.224 | i not
>% Subnet not in table
>
>R4# show ip route 170.1.24.7 255.255.255.0 | i not
>% Subnet not in table
>
>R4# show ip route 170.1.8.8 255.255.255.255 | i not
>% Subnet not in table
>
>R4# show ip route 150.50.4.8 255.255.255.0 | i not
>% Network not in table
>
>R4# show ip route 170.1.24.8 255.255.255.0 | i not
>% Subnet not in table
>
>R4# show ip route 170.1.9.9 255.255.255.255 | i not
>R4# show ip route 170.1.32.9 255.255.255.0 | i not
>R4# show ip route 170.1.15.9 255.255.255.192 | i not
>R4#
>
>
>------------------------------------------------------------------------
>--
>
>There's my missing routes!!! For some reason rip isn't making it to
>ospf on R4.
>
>
>-----Original Message-----
>From: Ahmed Mustafa [mailto:ahmed.mustafa@sbcglobal.net]
>Sent: Wednesday, February 18, 2004 9:44 PM
>To: ccielab@groupstudy.com
>Subject: Checking the Lab Work
>
>Guys,
>
>What is the easiest way to check the lab work. This is the most
>important
>task especially if one is taking a real lab.
>
>I mean what is the best way to find out that you are seeing all the
>routes in
>your routers that are you are supposed to be seeing, and pinging all the
>interfaces making sure that there is no loss of connectivity. I know
>that one
>can do this from each router to see what routes are seen and whether
>they are
>pingable
>Is there any work around?
>
>Thanks,
>
>Ahmed
>
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