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10-22-2014

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Virtual etc interfaces??

So after getting a Nagios plugin up and running that checks certain things including network interfaces, I get an error off the one box I built (as opposed to all of the others that were built by a former employee). The error complains of the "NIC logical group" failing.

All the boxes are HP DL380's with four physical NIC interfaces and an iLO port. For some reason the boxes not built by me all have ifcfg-eth configuration files for eth0 - eth5 (which would be six interfaces). While the machine I build only has eth0 - eth3 which corresponds to the four physical interfaces.

SO, I can assume from the error above, and the fact that eth4 and eth5 are not physical interfaces that they are some kind of logical interfaces configured but I'm not sure where to go from here with my investigation. I'm thinking there is some kind of link aggregation or bonding maybe going on, but not sure how to investigate this in Centos/Linux in general.

Any suggestions would be very much appreciated.

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LEARN ABOUT DEBIAN

vde_l3

VDE_L3(1)						      General Commands Manual							 VDE_L3(1)

NAME

       vde_l3 - Virtual Distributed Ethernet 'Layer 3' Switch.

SYNOPSIS

       vde_l3 -v vde_plug:ipaddress/netmask [-v...]  [-r target_network/netmask:gateway] [-G default_gw] [-M mgmt_socket]

DESCRIPTION

       A vde_l3 connects to one or more vde_switches, performing ip forwarding among its virtual interfaces. A new interface is created at startup
       for each -v option given at command line. Static routes to target networks can be defined using the -r option.

       vde_l3 -v /var/run/s1.ctl:192.168.0.1/24

       connects to the vde sock at /var/run/s1.ctl with its virtual interface ve0, having the address 192.168.0.1 and netmask 255.255.255.0.

       vde_l3 

       -v /var/run/s1.ctl:192.168.0.1/24 

       -v /var/run/s2.ctl:10.0.0.254/255.255.0.0

       connects to the two vde socks, with its virtual interfaces ve0 and ve1, having addressess 192.168.1.0 and 10.0.0.254 respectively. Hosts in
       each network can specify the vde_l3 as their gateway to reach the other one.

OPTIONS

       -v vde_plug:ipaddress/netmask
	      Creates a virtual network interfaces on the vde_l3 box, with address ipaddress and netmask netmask. Please note that the netmask can
	      be specified either in the 'classic' A.B.C.D mode, or just by giving the number of leading bits (f.e., /17 for 255.255.128.0).   One
	      can define as many interfaces as she wants.

       -r target_network/netmask:gateway
	      Specify  a static route through gateway to reach hosts in target_network with netmask netmask.  One can define as many routes as she
	      wants.

       -G default_gw
	      Specify a default gateway, to be used whenever no static route is defined for a target host.

       -M mgmt_socket
	      the unix socket where the parameters (interfaces addresses, routes, etc.) can be checked and changed  runtime.  unixterm(1)  can	be
	      used as a remote terminal for wirefilter.

NOTICE

       Virtual	Distributed  Ethernet is not related in any way with www.vde.com ("Verband der Elektrotechnik, Elektronik und Informationstechnik"
       i.e. the German "Association for Electrical, Electronic & Information Technologies").

SEE ALSO

       vde_switch(1), vdeq(1), unixterm(1), vde_cryptcab(1), wirefilter(1).

AUTHORS

       VDE_L3 is a tool by Daniele Lacamera <root@danielinux.net>

       VDE is a project by Renzo Davoli <renzo@cs.unibo.it>

Virtual Distributed Ethernet					    May 7, 2007 							 VDE_L3(1)