Compression mystery

From: Hunt Lee (ciscoforme3@yahoo.com.au)
Date: Tue Mar 11 2003 - 08:10:46 GMT-3

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Hi Group,

I saw the following config from a VoIP config...

Would you know what is the differnece between "ip tcp header-compression
iphc-format" & "ip rtp header-compression iphc-format"?

Is it the first one is used to compress TCP "data" traffic, whereas the latter one
is used to compress "RTP traffic" e.g. voice?

interface Multilink1
 ip unnumbered Ethernet1/0
 no ip directed-broadcast
 ip tcp header-compression iphc-format <--- This?
 no ip mroute-cache
 fair-queue 64 16 0
 no cdp enable
 ppp multilink
 ppp multilink fragment-delay 10
 ppp multilink interleave
 multilink-group 1
 ip rtp header-compression iphc-format <--- & this?
 ip rtp priority 16384 16383 48

And what does iphc-format do?

Any help / ideas would be greatly appreciated.

Regards,
Hunt

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