[LARTC] Problem with third link in multiple uplink configuration

[LARTC] Problem with third link in multiple uplink configuration

[Szymon Miotk]

Hello!

I have access server with 4 uplinks (nice, huh?). I ran RedHat 7.3. 
Yesterday I did an upgrade to RedHat 9.
After upgrade Linux says the third link is bad:

# ip route show
2.2.2.0/30 dev eth2  scope link  src 2.2.2.2
4.4.4.0/30 dev eth4  scope link  src 4.4.4.4
3.3.3.0/29 dev eth3  scope link  src 3.3.3.3
1.1.1.0/28 dev eth1  scope link  src 1.1.1.1
10.1.1.0/24 dev eth0  scope link
10.1.2.0/24 dev eth0  proto kernel  scope link  src 10.1.2.1
10.1.3.0/24 dev eth0  proto kernel  scope link  src 10.1.3.1
127.0.0.0/8 dev lo  scope link
default
         nexthop via 1.1.1.254  dev eth1 weight 11
         nexthop via 3.3.3.254  dev eth3 weight 20
         nexthop via 2.2.2.254  dev eth2 weight 10 dead pervasive
         nexthop via 4.4.4.254  dev eth4 weight 11

When I change the order of links in this command:
ip route add default scope global \
         nexthop via 1.1.1.254  dev eth1 weight 11 \
         nexthop via 3.3.3.254  dev eth3 weight 20 \
         nexthop via 2.2.2.254  dev eth2 weight 10 \
         nexthop via 4.4.4.254  dev eth4 weight 11

it's always the third link that is dead!

Anybody have a clue?

Szymon Miotk

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Re: [LARTC] Problem with third link in multiple uplink configuration

[Szymon Miotk]

The problem is solved!

Solution 1: quick & dirty
foreach $link (@links) {
   while ($link =~ /dead/) {
     add_entry(link)
   }
}

Solution 2: apply the most current patches.

Szymon Miotk

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