nanog mailing list archives

Re: Satellite latency


From: "Tony Rall" <trall () almaden ibm com>
Date: Tue, 5 Mar 2002 18:15:16 -0800


On Tuesday, 2002/03/05 at 08:42 ZE2, Hank Nussbacher <hank () att net il> 
wrote:
New 12.2(8)T feature in Cisco IOS called TCP Windows Scaling:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/12
2t8/tcpwslfn.htm

Specifically made for satellite networks:
ip tcp window-size 750000

I don't understand the benefit of this on a router.  Except for 
connections where the router itself is an endpoint (telnet to the router, 
for example), the router has no need to even be aware of window size.

Perhaps the router's window size comes into play if the router is 
performing advanced functions such as NAT or IPSEC?

Tony Rall


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