[j-nsp] ISIS redistribution : protocol direct vs static

Mihai mihaigabriel at gmail.com
Sun Oct 21 11:06:42 EDT 2012


The cause is isis activation on the interface with 10.0.3.3 ip address.
Sorry for the noise:)

On 10/21/2012 05:24 PM, Mihai wrote:
> Hello,
>
> Sorry if this subject was already discussed but I didn't find it by now.
> I am playing with ISIS and I noticed a difference between protocol
> direct and static when they are used in a redistribution policy:
>
> - redistribution of static protocol into a L1 area will result in an
> external L1 route
>
> - redistribution of direct protocol into a L1 area will result in an L1
> internal route
>
> R3 and R1 have a L1 adjancency:
>
> r3# run show isis adjacency
>
> ge-1/1/7.31 mx5t-r1 1 Up 21 64:87:88:5e:a5:36
>
> r3> show route protocol direct | match 10.0.3.
> 10.0.3.3/32 *[Direct/0] 1w4d 01:08:34
>
> r3> show route protocol static
>
> inet.0: 26 destinations, 26 routes (26 active, 0 holddown, 0 hidden)
> + = Active Route, - = Last Active, * = Both
>
> 100.100.100.0/24 *[Static/5] 00:25:05
> Discard
>
> r3# show policy-options
> policy-statement export-loopback {
> term 1 {
> from {
> protocol isis;
> level 2;
> route-filter 10.0.3.0/29 orlonger;
> }
> to level 1;
> then accept;
> }
> term 2 {
> from {
> protocol direct;
> route-filter 10.0.3.0/29 orlonger;
> }
> to level 1;
> then accept;
> }
> term 3 {
> from {
> protocol static;
> route-filter 100.100.100.0/24 exact;
> }
> to level 1;
> then accept;
> }
> }
>
> r1> show route protocol isis 10.0.3.3
>
> inet.0: 15 destinations, 15 routes (15 active, 0 holddown, 0 hidden)
> + = Active Route, - = Last Active, * = Both
>
> 10.0.3.3/32 *[IS-IS/15] 00:25:06, metric 10
>  > to 10.0.4.13 via ge-1/1/6.13
>
> r1> show route protocol isis 100.100.100.0
>
> inet.0: 15 destinations, 15 routes (15 active, 0 holddown, 0 hidden)
> + = Active Route, - = Last Active, * = Both
>
> 100.100.100.0/24 *[IS-IS/160] 00:25:22, metric 10
>  > to 10.0.4.13 via ge-1/1/6.13
>
>
> Is this the normal behavior?



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