Re: Network configuratin issue

[Dan Nelson]

In the last episode (Jun 23), Paul Prinsloo (TEBiVO) said:
> I've worked through the FreeBSD document, searching for a method to
> assigning one IP address to two physical NICs on the same subnet.
> Currently I'm a support administrator working on Tru64 UNIX systems,
> but every now and then I need to lend a hand to the FreeBSD staff,
> and my knowledge falls a little short here.
> 
> In Tru64, this is accomplished with Link Aggregation or lagconfig.
> I've searched high and low for a way of doing the same on a FreeBSD
> system, version 4.9, but to no avail. Any assistance or direction
> given as to how I can go about this, would truly be appreciated.

It can be done with netgraph and either the nc_fec or ng_one2many
nodes. ng_one2many is documented, but does not do link failure
detection and always uses roundrobin delivery (which may result in
out-of-order packets).  ng_fec's output hash can be either on MAC
address or IP address.  Neither node sends LACP or PAgP packets so you
must manually configure the switch at the other end.  The only
documentation for ng_fec is in the orignal maililnglist announcement at

http://docs.freebsd.org/cgi/getmsg.cgi?fetch=448009+0+archive/2001/freebsd-net/20010211.freebsd-net

-- 
Dan Nelson
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Re: Network configuratin issue

[Matthew Seaman]

On Wed, Jun 23, 2004 at 04:04:25PM +0200, Paul Prinsloo (TEBiVO) wrote:

> I've worked through the FreeBSD document, searching for a method to
> assigning one IP address to two physical NICs on the same subnet.
> Currently I'm a support administrator working on Tru64 UNIX systems, but
> every now and then I need to lend a hand to the FreeBSD staff, and my
> knowledge falls a little short here. 
> 
> In Tru64, this is accomplished with Link Aggregation or lagconfig. I've
> searched high and low for a way of doing the same on a FreeBSD system,
> version 4.9, but to no avail. Any assistance or direction given as to
> how I can go about this, would truly be appreciated. 

NetGraph is your friend.  Start by reading the ng_one2many(1) man
page.  Then look at netgraph(4), ngctl(8), ng_hook(8).  Note that
ng_one2many is designed to give you the agregate bandwidth of several
NICs -- not to provide resilient network connectivity.

There is also an undocumented ng_fec module which does ethernet
channel bonding using Cisco's Fast EtherChannel mechanism, but you'll
have to use the source to work out how to use it.

If you actually want resilience rather than bandwidth, then take a
look at the net/freevrrpd port.

Cheers,

Matthew


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Network configuratin issue

[Paul Prinsloo (TEBiVO)]

Good day

 

I've worked through the FreeBSD document, searching for a method to
assigning one IP address to two physical NICs on the same subnet.
Currently I'm a support administrator working on Tru64 UNIX systems, but
every now and then I need to lend a hand to the FreeBSD staff, and my
knowledge falls a little short here. 

 

In Tru64, this is accomplished with Link Aggregation or lagconfig. I've
searched high and low for a way of doing the same on a FreeBSD system,
version 4.9, but to no avail. Any assistance or direction given as to
how I can go about this, would truly be appreciated. 

 

Kind regards

Paul

 

PS. The online document I would like to complement the organization on.
It is well written, highly informative and truly clear and precise. I
wish others would conform to such a high degree of quality.

 

 

Paul Prinsloo 

TEBiVO Business Continuity 
Cell: +27 84 357 4032
[EMAIL PROTECTED]  
Tel: +27 21 940 9920 Fax: +27 21 888 7979 

 

Click here to view our e-mail legal notice: 
http://www.tebivo.com/email.htm   or
call: +27 21 888 7920 

 


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