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Configuration of IP-Forwarding Media Cards 133
4.4.11 Using grstat to Display GRF Statistics
Use the grstat -w70 all <interface> command to display the current statistics
of the FDDI card’s IP stack. The following is an actual screen shot:
# grstat all gf001
gf001
ipstat
count description
2958246 total packets received
3 packets dropped
2958226 packets forwarded normally
17 packets handled by the card
ipdrop
last last
count source addr dest addr reason
3 10.10.1.10 192.168.14.1 TTL expired
icmperr
last last last last last
count type code val source addr dest addr error
icmpin
last last last
count type code source addr dst addr
icmpout
last last last
count type code source addr dst addr
3 TIMXCEED INTRANS 10.10.1.13 10.10.1.10
#
4.5 HIPPI Configuration
This section provides the steps to configure the High Performance Parallel
Interface (HIPPI) media card of a GRF.
4.5.1 Introduction to HIPPI
HIPPI poses interesting configuration problems because of the number of
ways HIPPI connections can be established. Several addressing schemes
can be used, depending upon how a site needs to organize and connect
equipment to support a range of user needs.
Not only are there several addressing schemes, but a HIPPI media card can
be configured to process all of them. The HIPPI media card is capable of
handling both HIPPI-SC switching protocol and IP packet routing, and, based
on information field (I-field) indicators, can dynamically alternate between