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TRACK LIST BOOLEAN COMMAND UNDERSTANDING

Hello,

My name is Roger and I am going to implent a backup infraestrucuture using TRACK LIST BOOLEAN COMMAND.

The configuration we are using is:

!

track 100 list boolean and

object 110 not

!

track 110 ip sla 1

!

!

ip sla 1

icmp-echo 10.131.1.2 source-interface GigabitEthernet0/0

threshold 3

timeout 10000

frequency 15

ip sla schedule 1 life forever start-time now

!

!

ip route 10.160.0.0 255.255.0.0 192.168.10.1 220 track 100

!

Explanation:

When the router does not learn the network 10.160.0.0/16 by BGP it automatically redistribute tha static route:

ip route 10.160.0.0 0.0.255.255.0.0 192.168.10.1 220 track 100

only when track 100 is "UP". Analize when track 100 is "UP":

Track 100 is associated with object 110

The object 110 is associated with the command:

track 110 ip sla 1, which sense the reachability to the address 10.131.1.2.

If reachability to 10.131.1.2 exist, track 110 is UP.

Then, the command: object 110 not, gives the logical value of: DOWN

So, finally track 100 receive the logical value of: DOWN

As result, the static route:

ip route 10.160.0.0 0.0.255.255.0.0 192.168.10.1 220 track 100

is not taken into account and not redistributed because track 100 is DOWN.

Can some body tell us if this logical configuration is O.K.?

Waiting your sooner answer and any other suggestion.

Attn.

Roger Majo

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