From: Scott Morris (swm@emanon.com)
Date: Mon Aug 04 2003 - 21:46:00 GMT-3
Were both sides compressing originally and then you made it passive?
According to CCO:
"When IP maps at both ends of a connection inherit passive compression,
the connection will never transfer compressed traffic because neither
side will generate a packet with a compressed header."
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brown, Patrick (NSOC-OCF}
Sent: Monday, August 04, 2003 8:34 PM
To: 'ccielab@groupstudy.com'
Subject: RTP/TCP header compression
While putting tcp header compression in PASSIVE mode on BOTH sides of
the Frame Relay interface, compression was still occuring. I was under
the impression that one side had to be active and on had to be passive.
If both sides are waiting for an compress packet in passive mode, they
will never receive one. But the output shows different. If anyone can
provide some insight on this I will be greatful.
Topology:
(r4)---------------(r1)
r4
interface Serial0/0
ip address 132.15.74.4 255.255.255.224
encapsulation frame-relay
frame-relay map ip 132.15.74.1 401 broadcast tcp header-compression
passive no frame-relay inverse-arp frame-relay lmi-type cisco
r4#sh ip tcp header-compression
TCP/IP header compression statistics:
DLCI 401 Link/Destination info: ip 132.15.74.1
Interface Serial0/0: (passive, compression on)
Rcvd: 82 total, 71 compressed, 0 errors
0 dropped, 0 buffer copies, 0 buffer failures
Sent: 87 total, 74 compressed,
r1
interface Serial0/0
ip address 132.15.74.1 255.255.255.224
encapsulation frame-relay
frame-relay map ip 132.15.74.4 104 broadcast tcp header-compression
passive no frame-relay inverse-arp
R1#sh ip tcp header-compression
TCP/IP header compression statistics:
DLCI 104 Link/Destination info: ip 132.15.74.4
Interface Serial0/0: (passive, compression on)
Rcvd: 87 total, 74 compressed, 0 errors
0 dropped, 0 buffer copies, 0 buffer failures
Sent: 82 total, 71 compressed,
2485 bytes saved, 2616 bytes sent
1.94 efficiency improvement factor
Thanks,
Patrickb
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