From: Michael Snyder (msnyder@revolutioncomputer.com)
Date: Sun Feb 08 2004 - 18:19:13 GMT-3
-----Original Message-----
From: ccielab@cox.net [mailto:ccielab@cox.net]
Sent: Sunday, February 08, 2004 11:52 AM
To: Thomas Larus
Cc: ccielab@groupstudy.com
Subject: Re: Re: CCIE -lab - scripts .
Thomas,
Great advice, what is the 'tcp compression' issue?
thanks
------------------------------------------------------------------------
----Speaking of that, I did the following config one day. After reading it, I'm thinking it shouldn't have worked. Didn't have any problems.
How can you do active compression and also point back to yourself without it, and have it work on the same dlci?
interface Serial0
ip address 172.31.52.1 255.255.255.252
encapsulation frame-relay
frame-relay map ip 172.31.52.1 105
frame-relay map ip 172.31.52.2 105 broadcast compress active
no frame-relay inverse-arp
frame-relay lmi-type cisco
end
R2#sf m
Serial0 (up): ip 172.31.52.1 dlci 105(0x69,0x1890), static,
CISCO, status defined, active
Serial0 (up): ip 172.31.52.2 dlci 105(0x69,0x1890), static,
broadcast,
CISCO, status defined, active
TCP/IP Header Compression (enabled), connections: 256
RTP Header Compression (enabled), connections: 256
R2#p 172.31.52.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.52.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 132/134/144 ms
R2#p 172.31.52.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.52.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 68/68/72 ms
R2#
------------------------------------------------------------------------ --
interface Serial0.52 multipoint
ip address 172.31.52.2 255.255.255.252
frame-relay map ip 172.31.52.1 501 broadcast compress active
frame-relay map ip 172.31.52.2 501
end
R5#sf m
Serial0.52 (up): ip 172.31.52.1 dlci 501(0x1F5,0x7C50), static,
broadcast,
CISCO, status defined, active
TCP/IP Header Compression (enabled), connections: 256
RTP Header Compression (enabled), connections: 256
Serial0.52 (up): ip 172.31.52.2 dlci 501(0x1F5,0x7C50), static,
CISCO, status defined, active
R5#p 172.31.52.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.52.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 68/68/72 ms
R5#p 172.31.52.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.52.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 132/132/132 ms
R5#
> > From: "Thomas Larus" <tlarus@cox.net> > Date: 2004/02/08 Sun PM 12:05:52 EST > To: "Rahul Barua" <rahulbarua@touchtelindia.net>, <ccielab@groupstudy.com> > Subject: Re: CCIE -lab - scripts . > > That is a great post about scripts, and those were great aliases, too. > Still, I would like to remind CCIE candidates that ping scripts may not be > adequate tests of your network, so do not rely too much on them. > > You can break your network in ways that a ping script will not catch, by > misconfiguring extended access-lists or configuring TCP compression on only
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