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Re: Can I use more than one nic?

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On Wed, Feb 01, 2017 at 11:55:46AM -0600, Dennis Wicks wrote:
> I find myself with several unused NICs (network interface cards) and some
> empty ports on my switches.
> 
> Would it be beneficial to have more than one network connection on a system?
> 
> If so, what would I do with it, and how would I set it up? Pointers to
> tutorials and how-to's would be nice!

Case 1: A system becomes a router.
    Each NIC attaches to a different IP network. Turn on IP
    Forwarding. Now it's a router.
    Run iptables, and it's a firewall, too.

Case 2: a system gains redundancy and capacity.
    Each NIC attaches to the same switch. The switch has to be
    configurable to do Link Aggregation Protocol -- not all can.
    You configure the system NICs to become a bond device, using
    802.3ad mode. Now traffic can flow through all the bonded 
    NICs and is resilient if one of the links dies.

Case 3: direct connection to another system.
    If you have, for example, a machine which offers a lot of
    storage and a machine which uses a lot of storage, you can
    connect them directly and gain speed and security, possibly
    at the cost of redundancy.

-dsr-

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Thread

Can I use more than one nic? Dennis Wicks <wix@mgssub.com> - 2017-02-01 19:00 +0100
  Re: Can I use more than one nic? Dan Ritter <dsr@randomstring.org> - 2017-02-01 19:10 +0100
    Re: Can I use more than one nic? Sven Hartge <sven@svenhartge.de> - 2017-02-01 21:10 +0100
  Re: Can I use more than one nic? Dan Purgert <dan@djph.net> - 2017-02-01 19:20 +0100

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