problems with ng_fec

[Robert Blacquiere]

On Wed, Sep 06, 2006 at 10:56:48PM -0400, Michael W. Lucas wrote:
> 
> Hi,
> 
> (asked this first on -questions, but it seems that this exceeds their
> wisdom...)
> 
> I'm using a recent -current on amd64, and trying to use ng_fec to
> hopefully provide a wide-bandwidth connection with cable-level
> redundancy, and instead I get get errors and sporadic connectivity.
> 
> I configured fec0 as such:
> 
> #!/bin/sh
> 
> ngctl mkpeer fec dummy fec
> ngctl msg fec0: add_iface '"em3"'
> ngctl msg fec0: add_iface '"em7"'
> ngctl msg fec0: set_mode_inet
> ifconfig fec0 up
> ifconfig fec0 inet 10.184.1.19 netmask 255.255.0.0
> 
> The Cisco 6509 I was attached to had ports configured with:
> 
>  switchport trunk encapsulation dot1q
>  switchport mode trunk

You need a port channel interface and make the switchports member of the
port channel.

some thing like:

!
interface Port-channel1
 description 2 combined interfaces to freebsd fec0
 switchport
! only needed for vlan tagging...
! switchport trunk encapsulation dot1q  
! switchport trunk allowed vlan x,y,z,...
! switchport mode trunk
! mtu 9216
 no ip address

interface GigabitEthernet5/1
 description UPLINK #1 
 switchport
! needer only for vlan tagging
! switchport trunk encapsulation dot1q
! switchport trunk allowed vlan x,y,z,...
! switchport mode trunk
! mtu 9216
 no ip address
 no cdp enable
channel-group 1 mode on

interface GigabitEthernet5/2
 description UPLINK #2 
 switchport
! needer only for vlan tagging
! switchport trunk encapsulation dot1q
! switchport trunk allowed vlan x,y,z,...
! switchport mode trunk
! mtu 9216
 no ip address
 no cdp enable
channel-group 1 mode on


> 
> When I tried to ping various hosts, however, I got sporadic and
> intermittent connectivity to other hosts on the network.

This is spanning tree behavour.... 

> 
> Dmesg follows after log entries.
> 
> Any suggestions?
> 
> Thanks,
> ==ml

Hopeful this will give you a head start in configuring the cisco.

Robert
-- 
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