IBM 9077 manual Gf000 10.2.1.15 255.255.255.0

3.On the nodes in SP21 that are supposed to communicate with the different FDDI backbones, add the necessary routes:

route add -net 10.2.1 -netmask 255.255.255.0 -mtu 4352 192.168.14.4

route add -net 10.3.1 -netmask 255.255.255.0 -mtu 4352 192.168.14.4

route add -net 10.4.1 -netmask 255.255.255.0 -mtu 4352 192.168.14.4

route add -net 10.5.1 -netmask 255.255.255.0 -mtu 4352 192.168.14.4

The -mtu parameter is optional but should be set to ensure optimal packet size on this route.

4. Check for correct routing entries, for example:

root@sp21n01:/ netstat -rn
Routing tables
Destination	Gateway	Flags	Refs	Use	If	PMTU	Exp Groups
Route Tree for Protocol Family 2 (Internet):
default	192.168.4.137	UG	1	76666	en0	-	-
10.2.1/24	192.168.14.4	UG	0	7407273	css0	4352	-
10.3.1/24	192.168.14.4	UG	0	1413386	css0	4352	-
10.4.1/24	192.168.14.4	UG	0	1083727	css0	4352	-
10.5.1/24	192.168.14.4	UG	0	5046891	css0	4352	-
127/8	127.0.0.1	U	8	399	lo0	-	-
192.168.4/24	192.168.4.1	U	7	534581	en0	-	-
192.168.14/24	192.168.14.1	U	5	110190	css0	-	-
Route Tree for Protocol Family 24 (Internet v6):
::1	::1	UH	0	0	lo0 16896		-

5. On GRF 1600, check /etc/grifconfig.conf for the following entries:

gf000	10.2.1.15	255.255.255.0	-	mtu 4352
gf001	10.3.1.16	255.255.255.0	-	mtu 4352
gf002	10.4.1.17	255.255.255.0	-	mtu	4352
gf003	10.5.1.18	255.255.255.0	-	mtu	4352

6.On GRF 1600, check whether all four port interfaces are created successfully. Use netstat -inand look for lines starting with gf000, gf001, gf002 or gf003. They must not have an asterisk beside the interface name. If only gf000 appears, examine if all IP addresses assigned to the four FDDI ports really from different subnets and change IP addresses or network masks, if necessary.

Single RS/6000 SP and Single SP Switch Router 177