[c-nsp] Cisco 1720 and ip cef
Nigel
nigelc at iexec.com.au
Fri Sep 24 21:46:19 EDT 2004
Hi Rodney,
As requested:
a) Added ip cef accounting per-prefix (as suggested in (d) - the actual
command you mentioned was not available)
version 12.3
<snip>
!
!
ip cef
ip cef accounting per-prefix
!
!
!
!
interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode itu-dmt
!
interface ATM0.3 point-to-point
pvc 8/35
ubr 256
encapsulation aal5mux ppp dialer
dialer pool-member 3
!
!
interface ATM1
no ip address
no atm ilmi-keepalive
dsl operating-mode itu-dmt
!
interface ATM1.3 point-to-point
pvc 8/35
ubr 256
encapsulation aal5mux ppp dialer
dialer pool-member 3
!
!
interface FastEthernet0
ip address xxx
speed auto
no keepalive
!
interface Dialer3
bandwidth 512000
ip address negotiated
ip load-sharing per-packet
encapsulation ppp
dialer pool 3
ppp chap hostname xxx
ppp chap password xxx
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer3
<snip>
end
b)
Gateway of last resort is 0.0.0.0 to network 0.0.0.0
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
C 172.16.254.3/32 is directly connected, Dialer3
C 172.16.254.252/32 is directly connected, Dialer3
C 172.16.3.0/24 is directly connected, FastEthernet0
S* 0.0.0.0/0 is directly connected, Dialer3
c)
Router#sho ip cef
Prefix Next Hop Interface
0.0.0.0/0 attached Dialer3
0.0.0.0/32 receive
172.16.3.0/24 attached FastEthernet0
172.16.3.0/32 receive
172.16.3.1/32 172.16.3.1 FastEthernet0
172.16.3.11/32 172.16.3.11 FastEthernet0
172.16.3.12/32 172.16.3.12 FastEthernet0
172.16.3.13/32 172.16.3.13 FastEthernet0
172.16.3.14/32 172.16.3.14 FastEthernet0
172.16.3.15/32 172.16.3.15 FastEthernet0
172.16.3.20/32 172.16.3.20 FastEthernet0
172.16.3.31/32 172.16.3.31 FastEthernet0
172.16.3.32/32 172.16.3.32 FastEthernet0
172.16.3.53/32 172.16.3.53 FastEthernet0
172.16.3.54/32 172.16.3.54 FastEthernet0
172.16.3.55/32 172.16.3.55 FastEthernet0
172.16.3.71/32 172.16.3.71 FastEthernet0
172.16.3.82/32 172.16.3.82 FastEthernet0
172.16.3.83/32 172.16.3.83 FastEthernet0
172.16.3.84/32 172.16.3.84 FastEthernet0
172.16.3.85/32 172.16.3.85 FastEthernet0
172.16.3.92/32 172.16.3.92 FastEthernet0
172.16.3.102/32 172.16.3.102 FastEthernet0
172.16.3.103/32 172.16.3.103 FastEthernet0
172.16.3.108/32 172.16.3.108 FastEthernet0
172.16.3.113/32 172.16.3.113 FastEthernet0
172.16.3.114/32 172.16.3.114 FastEthernet0
172.16.3.115/32 172.16.3.115 FastEthernet0
172.16.3.116/32 172.16.3.116 FastEthernet0
172.16.3.118/32 172.16.3.118 FastEthernet0
172.16.3.120/32 172.16.3.120 FastEthernet0
172.16.3.131/32 receive
172.16.3.161/32 172.16.3.161 FastEthernet0
172.16.3.162/32 172.16.3.162 FastEthernet0
172.16.3.163/32 172.16.3.163 FastEthernet0
172.16.3.164/32 172.16.3.164 FastEthernet0
172.16.3.165/32 172.16.3.165 FastEthernet0
172.16.3.166/32 172.16.3.166 FastEthernet0
172.16.3.167/32 172.16.3.167 FastEthernet0
172.16.3.168/32 172.16.3.168 FastEthernet0
172.16.3.169/32 172.16.3.169 FastEthernet0
172.16.3.170/32 172.16.3.170 FastEthernet0
172.16.3.171/32 172.16.3.171 FastEthernet0
172.16.3.172/32 172.16.3.172 FastEthernet0
172.16.3.173/32 172.16.3.173 FastEthernet0
172.16.3.174/32 172.16.3.174 FastEthernet0
172.16.3.175/32 172.16.3.175 FastEthernet0
172.16.3.181/32 172.16.3.181 FastEthernet0
172.16.3.182/32 172.16.3.182 FastEthernet0
172.16.3.183/32 172.16.3.183 FastEthernet0
172.16.3.184/32 172.16.3.184 FastEthernet0
172.16.3.255/32 receive
172.16.254.3/32 receive
172.16.254.252/32 attached Virtual-Access3
attached Virtual-Access2
Prefix Next Hop Interface
224.0.0.0/4 drop
224.0.0.0/24 receive
255.255.255.255/32 receive
d)
Router(config)#ip cef accounting ?
non-recursive Enable accounting for traffic through non-recursive
prefixes
per-prefix Enable per prefix accounting
prefix-length Enable prefix length accounting
Router(config)#^Z
Router#sh ip cef 0.0.0.0 ?
A.B.C.D prefix mask
detail Display full information
| Output modifiers
<cr>
Router#sh ip cef 0.0.0.0
0.0.0.0/32, version 0, epoch 0, receive
Router#sh ip cef 0.0.0.0 0.0.0.0
0.0.0.0/0, version 7, epoch 0, attached
0 packets, 0 bytes
via Dialer3, 0 dependencies
valid punt adjacency
Thanks again.
Nigel
-----Original Message-----
From: Rodney Dunn [mailto:rodunn at cisco.com]
Sent: Friday, September 24, 2004 10:31 PM
To: Nigel
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Cisco 1720 and ip cef
We need to see:
a) the configuration
b) show ip route
c) show ip cef
d) if you are using a default route out we
need you to enable:
ip cef accounting load
and do 'sh ip cef 0.0.0.0 int' a couple of times.
Rodney
On Fri, Sep 24, 2004 at 10:49:53AM +1000, Nigel wrote:
> Hi All,
>
> I am running into some trouble regarding the cisco 1720 and ip cef
> load balancing.
>
> The router has 2 adsl wics in it. Each dsl connection is 1.5M/256.
>
> The problem is that on the outbound path the traffic is only ever
> going out
> 1 specific wic. I have tried forcing cef to per packet in order to
> push traffic out both interfaces, but this still results in traffic
> only going out the 1 interface still. If I shutdown the interface that
> is passing outbound traffic the router drops of the network completely.
>
> The inbound traffic comes down both wics. So far the ios has been
> upgraded to 12.3(10) and the wic has been swapped out. Neither has made a
difference.
>
> It leaves the actual wic slot on the 1720 or the possibility that the
> 1720 just can't deal with load balancing.
>
> Here are the outputs from the interfaces:
>
> Router#sho int atm0 | inc rate
> Queueing strategy: Per VC Queueing
> 5 minute input rate 112000 bits/sec, 38 packets/sec
> 5 minute output rate 0 bits/sec, 0 packets/sec
>
>
> Router#sho int atm1 | inc rate
> Queueing strategy: Per VC Queueing
> 5 minute input rate 110000 bits/sec, 37 packets/sec
> 5 minute output rate 32000 bits/sec, 98 packets/sec
>
>
> Any ideas at all?
>
> Thanks in advanced.
>
> Regards,
>
> Nigel
>
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