Re: route policy with cef

alwboy · ‎09-04-2004

I have a 3661 series router . I must use policy route

on int f0/0 . But if i open cef on f0/0 , the policy route is unactive. After i close cef on f0/0 , the policy route is active . Why did it happen ? I read a

article that said cef support polciy route . I get a puzzle!

Some information:

show version

Cisco Internetwork Operating System Software

IOS (tm) 3600 Software (C3660-TELCO-M), Version 12.3(5b), RELEASE SOFTWARE (fc1)

Compiled Thu 15-Jan-04 18:42 by kellythw

Image text-base: 0x60008AF4, data-base: 0x61240000

interface FastEthernet0/0

description fast

ip address 131.179.0.1 255.255.255.0

no ip proxy-arp

ip route-cache policy

ip route-cache flow

no ip route-cache cef

ip policy route-map Internet

ip ospf cost 5

ip ospf priority 5

speed 100

full-duplex

no cdp enable

hold-queue 300 in

thank you very much

Georg Pauwen · ‎09-04-2004

Hello,

strange indeed, as, beginning in Cisco IOS Release 12.0, PBR is supported in CEF. Can you post the full configuration of your router ?

Regards,

Georg

alwboy · ‎09-05-2004

Thanks Georg!

I feel strange too. But It is fact!

I copy my config.

ip subnet-zero

ip cef

no ip domain lookup

no ftp-server write-enable

chat-script callback ABORT ERROR ABORT BUSY "" "ATZ" OK "ATDT \T" TIMEOUT 60 CONNECT \c

!

buffers small permanent 100

buffers small max-free 200

buffers middle permanent 100

buffers middle max-free 200

!

interface Loopback1

ip address 131.179.255.1 255.255.255.0

!

interface FastEthernet0/0

description fast

ip address 131.179.0.1 255.255.255.0

no ip proxy-arp

ip route-cache policy

ip route-cache flow

no ip route-cache cef

ip policy route-map Internet

ip ospf cost 5

ip ospf priority 5

speed 100

full-duplex

no cdp enable

hold-queue 300 in

!

interface Serial1/0

no ip address

shutdown

serial restart-delay 0

no cdp enable

!

interface Serial1/1

no ip address

shutdown

serial restart-delay 0

no cdp enable

!

interface Serial1/2

no ip address

shutdown

serial restart-delay 0

no cdp enable

!

interface Serial1/3

no ip address

shutdown

serial restart-delay 0

no cdp enable

!

interface FastEthernet4/0

ip address 131.179.4.17 255.255.255.252

no ip proxy-arp

ip ospf cost 40

delay 6000

duplex auto

speed auto

no cdp enable

!

interface FastEthernet4/1

ip address 131.179.4.21 255.255.255.252

no ip proxy-arp

ip ospf cost 40

delay 6000

duplex auto

speed auto

no cdp enable

!

interface FastEthernet6/0

ip address 131.179.4.37 255.255.255.252

no ip proxy-arp

ip ospf cost 20

duplex auto

speed auto

no cdp enable

!

interface FastEthernet6/1

no ip address

load-interval 30

duplex auto

speed auto

no cdp enable

!

interface Group-Async1

ip unnumbered FastEthernet0/0

encapsulation ppp

peer default ip address pool default

ppp callback accept

ppp authentication chap

group-range 65 80

!

router ospf 100

log-adjacency-changes

network 131.179.0.0 0.0.0.255 area 1

network 131.179.4.16 0.0.0.3 area 0

network 131.179.4.20 0.0.0.3 area 0

network 131.179.4.36 0.0.0.3 area 1

network 131.179.255.0 0.0.0.255 area 1

default-information originate always

!

ip local pool default 162.16.254.1 162.16.254.10

no ip http server

ip classless

ip route 10.200.0.0 255.255.255.0 10.3.0.2

ip route 162.16.27.0 255.255.255.0 131.179.0.12

ip route 162.16.27.6 255.255.255.255 131.179.0.12

!

logging trap debugging

logging 162.16.17.244

access-list 10 permit any

no cdp run

route-map Internet permit 10

match ip address 10

set ip default next-hop 131.179.4.18 131.179.4.22

!

snmp-server community public RO

snmp-server enable traps tty

Now ,u see I close the cef on int f0/0 . The route policy is acting .

Richard Burts · ‎09-05-2004

I am not sure what you mean by policy route is unactive. Can you be more specific about what is happening and what is the problem?

Also it would be helpful to post the route map and any access lists referred to by the route map.

HTH

Rick

HTH

Rick

alwboy · ‎09-05-2004

Thank rburt's regard.

The problem is that when i open cef on int f0/0

, the route policy is unfunction on int f0/0 .

The normal route act instead of route policy.

When I close cef on int f0/0 . The route policy on int f0/0 is function well.

Why do it happen?

My configurtion : reference my attachement!

Can i see it , rburts Mr?

Thank your regards ,again!

Richard Burts · ‎09-05-2004

In the first place I still do not understand your description of the problem. How are you determining whether policy routing is active or is not active? Is there some command you are using to determine this? If so what command? If it is not a command how are you making this distinction?

In the second place I have looked at your config and I have a guess about what is happening. I notice that your route map is as follows:

route-map Internet permit 10

match ip address 10

set ip default next-hop 131.179.4.18 131.179.4.22

so for all traffic incoming on the interface you are setting the default next-hop. I wonder why you are setting default next-hop instead of setting next-hop or something like that. Default next-hop is only used if there is not a route for the destination. My guess is that with cef enabled there is a route so the default next-hop is not needed and not used. I would suggest that perhaps you change the route map so that it sets next-hop. I believe you will find that in that case there is no effect of enabling cef.

HTH

Rick

HTH

Rick

alwboy · ‎09-05-2004

Thanks Mr rburts !

I am sorry that i have a litte in english.

I want to branch the flow no explicting route .

Yes, when i open cef on int f0/0 , i found the flow

no explicting route is lost. It is normal route .

If i add a default route 0.0.0.0 0.0.0.0 131.179.4.18

i found the flow fllow the default route! So, i determined that i open cef that route policy is unactive.

Thank u very much..