13.16 IRDP

Hi,

Although I consulted the RFc for IRDP, I still don't get it why gateway is changing for SW1, as presented in the SG for this task :

Rack18SW1#sh ip route
Gateway         Using  Interval  Priority   Interface
155.18.58.8     IRDP       15       500     Vlan58
155.18.58.5     IRDP       14      1000     Vlan58

Default gateway is 155.18.58.8

Host               Gateway           Last Use    Total Uses  Interface
ICMP redirect cache is empty

In the RFC 1256 it clearly states that higher value is more preferrable. Ok, now, why is the gateway being balanced the two ?

I had it like this earlier :

Rack18SW1#sh ip route
Gateway         Using  Interval  Priority   Interface
155.18.58.8     IRDP       15       500     Vlan58
155.18.58.5     IRDP       16      1000     Vlan58

Default gateway is 155.18.58.5

Host               Gateway           Last Use    Total Uses  Interface
ICMP redirect cache is empty

R5 and Sw2 config :

Rack18R5#sh run int fa 0/0 | i irdp
 ip irdp
 ip irdp maxadvertinterval 20
 ip irdp minadvertinterval 10
 ip irdp holdtime 60
 ip irdp preference 1000

Rack18SW2#sh run int vl 58 | i irdp
 ip irdp
 ip irdp maxadvertinterval 20
 ip irdp minadvertinterval 10
 ip irdp holdtime 60
 ip irdp preference 500

I used this option < ip irdp preference 500 >, as well as the presented solution in SG : ip irdp address a.b.c.d preference, no difference.

Any ideas ? Did you guys have these issues ?

Thank,

Ciprian.