Setup guide

7-13
Fast Ethernet Interconnect Requirements
On node #2 ping every node and check reachability with every node
# ping node1_X
# rsh node1_X uname –a
which returns AIX node1_X
# ping node3_X
# rsh node3_X uname –a
which returns AIX node3_X
and so on.
and proceed the same with all the other nodes.
Setting Network Parameters for Testing
Ethernet
TCP/IP Configuration
Default values:
thewall = 16384
sb_max = 65536
somaxconn = 1024
clean_partial_conns = 0
net_malloc_police = 0
rto_low = 1
rto_high = 64
rto_limit = 7
rto_length = 13
arptab_bsiz = 7
arptab_nb = 25
tcp_ndebug = 100
ifsize = 8
arpqsize = 1
route_expire = 0
strmsgsz = 0
strctlsz = 1024
nstrpush = 8
strthresh = 85
psetimers = 20
psebufcalls = 20
strturncnt = 15
pseintrstack = 12288
lowthresh = 90
medthresh = 95
psecache = 1
subnetsarelocal =
maxttl = 255
ipfragttl = 60
ipsendredirects = 1
ipforwarding = 0
udp_ttl = 30
tcp_ttl = 60
arpt_killc = 20
tcp_sendspace = 4096
tcp_recvspace = 4096
udp_sendspace = 9216
udp_recvspace = 41600
rfc1122addrchk = 0
nonlocsrcroute = 0
tcp_keepintvl = 150
tcp_keepidle = 14400
bcastping = 0
udpcksum = 1
tcp_mssdflt = 512
icmpaddressmask = 0
tcp_keepinit = 150
ie5_old_multicast_mapping = 0
rfc1323 = 0
pmtu_default_age = 10
pmtu_rediscover_interval = 30
udp_pmtu_discover = 0
tcp_pmtu_discover = 0
ipqmaxlen = 100
directed_broadcast = 1
ipignoreredirects = 0
ipsrcroutesend = 1
ipsrcrouterecv = 0
ipsrcrouteforward = 1
Figure 39. TCP/IP Configuration Default Values
Adapter Configuration
Default values:
Transmit queue size = 64
Receive buffer pool size = 32
Configuring PCI Fast Ethernet Adapter
For the media speed parameter of any PCI adapter, it is recommended:
– not to let the auto-negotiating default behavior, but to set the speed 10Mbps or
100Mbps of the adapter according to the LAN speed
– to choose half duplex mode when using a Fast Ethernet switch
– to choose full duplex mode when there is no Fast Ethernet switch.