topic Re: can not route through 2nd nic/interface in Operating System - OpenVMS

can not route through 2nd nic/interface

Tim Killinger — Tue, 03 Jun 2003 00:29:44 GMT

I have configured the second NIC on our VMS 7.1 host. It comes up (we1) and can be used only on the local subnet. I've run ucx$config and swapped ip addresses between we0 and we1 and still can only route through we0. Both NICS are on the same subnet using the same default router. Any idea why the second NIC won't route(we1)???

Thanks!!!

Re: can not route through 2nd nic/interface

Ian Miller. — Tue, 03 Jun 2003 08:37:46 GMT

are you using static or dynamic routing? Can you post the result of UCX SHOW ROUTE?

Re: can not route through 2nd nic/interface

Tim Killinger — Tue, 03 Jun 2003 09:01:59 GMT

I'm guess were static. Here's "show route".

[KILLINGER]> ucx show route

DYNAMIC database

Type Destination Gateway

AH 127.0.0.1 127.0.0.1
AN 0.0.0.0 144.70.165.126
AN 144.70.165.0 144.70.165.115
AN 144.70.165.0 144.70.165.74
[KILLINGER]>

Re: can not route through 2nd nic/interface

Gorazd Kikelj — Wed, 04 Jun 2003 12:01:23 GMT

Usualy every NIC must be in different subnet.

Re: can not route through 2nd nic/interface

Pim van Velzen — Thu, 05 Jun 2003 09:09:55 GMT

Since TCP/IP for OpenVMS V5.1 it is supported
to have two NICs in the same subnet.

From the V5.1 Release Notes.

""
o Multiple adapters per subnet

You can configure multiple active network adapters in one computer, even if they operate on the same subnetwork. For example, you can configure a WE0 interface at 192.24.156.20 and a WE1 interface at 192.24.156.21 with the same netmask.

When you establish a connection, the kernel routes the connection through the interface that has the smallest number of connections. As a result, connections are load-balanced, leading to greater throughput than on a system with only one adapter per subnetwork.
""