Multiple Default Gateways

[SLG]

I have an AIX box connected to two different networks and I need to define two different default gateways so that users from both networks can access it. I am having trouble figureing out the best way to do this.
Thanks in advance for your suggestions.

 

[theycallmetim]

You cannot assign 2 different default gateways, hence the term default. You can assign it one, and your users from both networks will be able to access the machine (depending on your network configuration)

 

[SLG]

OK, let me describe the situation better.
I have 2 T1s connecting to the box through two different ISPs and two differnet subnets. I intend to setup VPNs to about 300 users on one network and 500 on the other.
That is why I need to setup gateways for both cards in the box.
I've been playing with gated but it is turning to be a real pain in the butt.
Any help would be appreciated.

 

[Yegolev]

you will need to assign one default gateway then add routes like so:

Routing tables
Destination Gateway Flags Refs Use If PMTU Exp Groups

Route Tree for Protocol Family 2 (Internet):
default 177.234.240.65 UG 120 692361484 en1 - -
127/8 127.0.0.1 U 7 2001824 lo0 - -
177.234.240.64/26 177.234.240.93 U 45 147778868 en1 - -
177.234.252.88 177.234.240.65 UGHW 0 908940 en1 - 5
199.123/25 199.123.3.126 UG 0 19610 en2 - -
199.123.0.128/25 199.123.3.126 UG 0 0 en2 - -
199.123.1/25 199.123.3.126 UG 0 11335 en2 - -
199.123.1.128/25 199.123.3.126 UG 0 0 en2 - -
199.123.2/25 199.123.3.126 UG 0 0 en2 - -
199.123.2.128/25 199.123.3.126 UG 0 0 en2 - -
199.123.3/25 199.123.3.24 U 21 81097437 en2 - -
199.123.4/25 199.123.3.126 UG 0 0 en2 - -
199.123.4.128/25 199.123.3.126 UG 0 0 en2 - -
199.123.5/25 199.123.3.126 UG 0 0 en2 - -
199.123.5.128/25 199.123.3.126 UG 0 0 en2 - -
199.123.6/25 199.123.3.126 UG 0 34750 en2 - -
199.123.6.128/25 199.123.3.126 UG 0 0 en2 - -
199.123.7/25 199.123.3.126 UG 0 46812 en2 - -
199.123.7.128/25 199.123.3.126 UG 0 0 en2 - -
199.123.8/25 199.123.3.126 UG 0 0 en2 - -
199.123.8.120 199.123.3.126 UGH 0 0 en2 - -
199.123.8.128/25 199.123.3.126 UG 0 0 en2 - -
199.123.9/25 199.123.3.126 UG 0 1443 en2 - -
199.123.9.128/25 199.123.3.126 UG 0 0 en2 - -

Route Tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 16896 -


IBM Certified -- AIX 4.3 Obfuscation

 

[Yegolev]

a working example from our implementation. these two class B networks cannot see each other and most of our servers have both. in this example, 199.123.3.126 is the switch for the second network.

usually we have this scripted like so:
print "adding routes to the ${privbase}.${oct}.0 and ${privbase}.${oct}.128" "networks via ${gateway}..."
print "$(mkdev -t inet) ... \c"
print "$(chdev -l inet0 -a route=net,-hopcount,1,-netmask,${netmask},${privbase}.${oct}.0,${gateway})" "... \c"

${privbase} would be 199.123 in this case.

IBM Certified -- AIX 4.3 Obfuscation