topic Re: Secondary Interface. in Operating System - HP-UX

Secondary Interface.

Nobody's Hero — Mon, 11 Nov 2002 15:13:30 GMT

Hello,
I installed a secondary lan interface (lan10) card on my Nclass running 11.0. It's active and appears to be configured correctly. It's in DNS, I can ping it and telnet to it. However glance shows all activity going to the lan1 card. How can I force activity on the secondary interface? I telneted to the secondary interface and tried ftp'ing a file(get) from another box, a real large file. All activity showed on the lan1.

Bob

Re: Secondary Interface.

Nobody's Hero — Mon, 11 Nov 2002 15:22:00 GMT

Yes, they are on different sub nets. So with these route add commands. Can I interrupt service to the box while configuring the secondary interface with route adds?

Re: Secondary Interface.

A. Clay Stephenson — Mon, 11 Nov 2002 15:22:48 GMT

First of all,I assume that these cards are on different subnets; if not, they need to be. Having more than 1 card on the same subnet (without APA) is chaotic. It almost works well.

If your card is properly configured, you still need to tell your box how to route through this second interface. That is doune using route add commands. Man 1m route for details.

Re: Secondary Interface.

John Palmer — Mon, 11 Nov 2002 15:24:55 GMT

What IP addresses are you using? Please post the output from 'netstat -in' and 'netstat -rnv'.

Regards,
John

Re: Secondary Interface.

Nobody's Hero — Mon, 11 Nov 2002 15:25:44 GMT

netstat -rnv
Routing tables
Dest/Netmask Gateway Flags Refs Use Interface Pmtu
127.0.0.1/255.255.255.255
127.0.0.1 UH 0 1504 lo0 4136
10.31.1.2/255.255.255.255
10.31.1.2 UH 0 14452 lan10 4136
172.16.9.69/255.255.255.255
172.16.9.69 UH 0 24677 lan5 4136
10.31.1.0/255.255.255.0
10.31.1.2 U 2 0 lan10 1500
172.16.8.0/255.255.248.0
172.16.9.69 U 2 0 lan5 1500
127.0.0.0/255.0.0.0 127.0.0.1 U 0 0 lo0 4136
default/0.0.0.0 172.16.8.1 UG 0 0 lan5 1500

Re: Secondary Interface.

Nobody's Hero — Mon, 11 Nov 2002 15:26:41 GMT

10.31.1.2 is the secondary interface.

netstat -rn
Routing tables
Dest/Netmask Gateway Flags Refs Use Interface Pmtu
127.0.0.1 127.0.0.1 UH 0 1504 lo0 4136
10.31.1.2 10.31.1.2 UH 0 14395 lan10 4136
172.16.9.69 172.16.9.69 UH 0 24669 lan5 4136
192.151.53.128 172.16.8.26 UGH 0 0 lan5 1500
64.58.76.228 172.16.8.26 UGH 0 0 lan5 1500
10.31.1.0 10.31.1.2 U 2 0 lan10 1500
172.16.8.0 172.16.9.69 U 2 0 lan5 1500
127.0.0.0 127.0.0.1 U 0 0 lo0 4136
default 172.16.8.1 UG 0 0 lan5 1500

Re: Secondary Interface.

John Palmer — Mon, 11 Nov 2002 15:53:50 GMT

Hi,

The way that you've got the routing table configured at the moment, all outgoing traffic (apart from addresses in the 10.31.1 subnet) will go via your lan5.

You can add routes 'on the fly' without any problem but they will require you to have at least one router in the 10.31.1 subnet.

Regards,
John

Re: Secondary Interface.

Nobody's Hero — Mon, 11 Nov 2002 16:34:37 GMT

What about incomming traffic. Does that default to only the primary lan1?

Re: Secondary Interface.

Nobody's Hero — Mon, 11 Nov 2002 16:38:46 GMT

So there is no way to send traffic directly to lan10 as it is set up now?

Re: Secondary Interface.

Eric Kimminau — Tue, 12 Nov 2002 14:27:39 GMT

You would need to set up higher metric network routes to the networks you want to try to reach via your secondary interface. In the case of failure or excessive utilization on your primary interface, then all traffic for those defined networks would use the secondary interface.

In both IRIX and Solaris there is a concept of interface "bonding". In Solaris this is done via mpathd.

An interesting message you may want to read:
http://aa11.cjb.net/hpux_admin/2000/06/0221.html
There is a software product called Auto-Port Aggregation. The software can
perform the following function:
o load balancing
o hot standby (no load balancing)
o link aggregate
o Bandwidth scaling (2 * 100BaseT give 200 Mbps, 4 * 100BaseT gives 400
Mbps)
o redundancy
o Single MAC address

And it supports 100BaseT, gigabits, and FDDI. However, it doesn't support a
mixture of network card models, as documented.

The description can be found in
http://www.unix.hp.com/operating/networking/autoport_aggregation/index.html

Hope that helps!

Eric.