When trying to send a large file from a 5.1b machine to an XP machine over a long(ish) link (15 miles), I see slow transfer speeds and strange patterns in network traffic. This problem does not exist when both machines are local or when going from the XP machine to the 5.1b machine.
While watching network traffic on the XP machine, I observe bursts of traffic followed by silence. The bursts last between 1 and 15 seconds. The length of the silence will be between 29 and 15 seconds ... making the time from start of the first burst to the start of the second burst always 30 seconds.
Here are my parameters from the 5.1b machine:
root@ekpcras1# sysconfig -q inet
inet:
icmp_redirecttimeout = 0
icmp_rejectcodemask = 0
inifaddr_hsize = 32
ip_max_frag_index = 64
ipdefttl = 64
ipdirected_broadcast = 0
ipforwarding = 0
ipfragttl = 60
ipgateway = 0
ipport_userreserved = 65535
ipport_userreserved_min = 1024
ipqmaxlen = 65535
ipqs = 16
ipsendredirects = 1
ipsrcroute = 1
pmtu_decrease_intvl = 1200
pmtu_enabled = 1
pmtu_increase_intvl = 240
pmtu_rt_check_intvl = 20
subnetsarelocal = 1
tcbhashnum = 1
tcbhashsize = 1024
tcbquicklisten = 1
tcp_compat_42 = 1
tcp_cwnd_segments = 8
tcp_dont_winscale = 0
tcp_keepalive_default = 1
tcp_keepcnt = 8
tcp_keepidle = 30
tcp_keepinit = 150
tcp_keepintvl = 30
tcp_msl = 60
tcp_mssdflt = 536
tcpnodelack = 0
tcp_recvspace = 262144
tcp_rexmit_interval_min = 2
tcp_rexmtmax = 128
tcprexmtthresh = 3
tcp_rttdflt = 3
tcp_sendspace = 65536
tcp_ttl = 128
tcptwreorder = 0
tcp_urgent_42 = 1
udpcksum = 1
udp_recvspace = 262144
udp_sendspace = 262144
udp_ttl = 128
Thanks for any help,
D.
