Bandwidth distribution per port in 1841

[hello]

Hello cisco experts!


I have a problem with my scenario in distributing 100mb internet bandwidth with class and policy maps in Cisco Router 1841 which I inherited from an old friend. Its FastEthernet0/0 is connected to an ISP router for internet connection. This link will be distributed to 3 VLAN ports for 3 private networks. I'd like to solicit for your input guys please as to why my current configuration is not, for the life of me, matching packets per interface port.


Here's the configuration i have:


Current configuration : 4049 bytes

!

version 15.1

no service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

!

hostname R1

!

ip dhcp excluded-address 192.168.10.1

ip dhcp excluded-address 192.168.11.1

ip dhcp excluded-address 192.168.12.1

!

ip dhcp pool vlan10

network 192.168.10.0 255.255.255.252

default-router 192.168.10.1

ip dhcp pool vlan11

network 192.168.11.0 255.255.255.252

default-router 192.168.11.1

ip dhcp pool vlan12

network 192.168.12.0 255.255.255.252

default-router 192.168.12.1

!

ip cef

no ipv6 cef

!

no ip domain-lookup

!

spanning-tree mode pvst

!

class-map match-all subnet-a

match input-interface FastEthernet0/0/0

class-map match-all subnet-b

match input-interface FastEthernet0/0/1

class-map match-all subnet-c

match input-interface FastEthernet0/0/2

!

policy-map shaper

class subnet-a

bandwidth percent 20

class subnet-b

bandwidth percent 20

class subnet-c

bandwidth percent 30

class class-default

fair-queue

random-detect

shape average 100000000

!

interface Loopback0

ip address 172.16.8.1 255.255.255.255

!

interface FastEthernet0/0

ip address dhcp

ip nat outside

service-policy output shaper

ip virtual-reassembly

duplex auto

speed auto

!

interface FastEthernet0/1

no ip address

duplex auto

speed auto

shutdown

!

interface FastEthernet0/0/0

switchport access vlan 10

switchport mode access

!

interface FastEthernet0/0/1

switchport access vlan 11

switchport mode access

!

interface FastEthernet0/0/2

switchport access vlan 12

switchport mode access

!

interface FastEthernet0/0/3

switchport mode access

shutdown

!


interface Vlan1

no ip address

shutdown

!

interface Vlan10

ip address 192.168.10.1 255.255.255.252

ip nat inside

!

interface Vlan11

ip address 192.168.11.1 255.255.255.252

ip nat inside

!

interface Vlan12

ip address 192.168.12.1 255.255.255.252

ip nat inside

!

ip nat inside source list 7 interface FastEthernet0/0 overload

ip classless

ip route 0.0.0.0 0.0.0.0 FastEthernet0/0

!

ip flow-export version 9

!

!

access-list 7 permit any

!

!

end



Thanks in advance!


Timtim

[Georg Pauwen · Accepted solution]

Hello,

change your class maps to:

class-map match-all subnet-a

match input vlan 10

class-map match-all subnet-b

match input vlan 11

class-map match-all subnet-c

match input vlan 12

[hello]

Thank you for the quick reply Sir Georg Pauwen!

Unfortunately, i can't find the command you are suggesting in my 1841. You think I'm using a wrong IOS version? Below are the outputs of my router's match input-interface and show version commands.

R1(config-cmap)#match input-interface ?

Ethernet IEEE 802.3

FastEthernet FastEthernet IEEE 802.3

GigabitEthernet GigabitEthernet IEEE 802.3z

Loopback Loopback interface

Serial Serial

R1(config)#do sh ver

Cisco IOS Software, 1841 Software (C1841-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Wed 18-Jul-07 04:52 by pt_team

ROM: System Bootstrap, Version 12.3(8r)T8, RELEASE SOFTWARE (fc1)

System returned to ROM by power-on

System image file is "flash:c1841-advipservicesk9-mz.124-15.T1.bin"

Also, you have any idea why i'm not getting packet readings with match input-interface fax/x at all?

Thanks!

[Georg Pauwen]

Hello,

12.4 is rather outdated. I would think that even 'match vlan' is not available as an option in the class-map.

Try to use access lists as match criteria:

class-map match-all subnet-a
 match address 110
class-map match-all subnet-b
 match address 111
class-map match-all subnet-c
 match address 112

access-list 110 permit ip 192.168.10.0 0.0.0.255 any
access-list 111 permit ip 192.168.11.0 0.0.0.255 any
access-list 112 permit ip 192.168.12.0 0.0.0.255 any

[hello]

Hi,

You're right in that match vlan is not an available option too. I also changed the config as you suggested but nope still not seeing them even hit the ACL.

Can you figure of a specific IOS version which might probably fix the problem?

[Georg Pauwen]

Hello,

what options do you have with regard to match criteria in the class map ?

match ?

[hello]

Here you go sir.

R1(config-cmap)#match ?

access-group Access group

any Any packets

class-map Class map

cos IEEE 802.1Q/ISL class of service/user priority values

destination-address Destination address

input-interface Select an input interface to match

ip IP specific values

not Negate this match result

precedence Match Precedence in IP(v4) and IPv6 packets

protocol Protocol

qos-group Qos-group

[hello]

Thanks for the patience and input sir Georg Pauwen. This solution worked like a charm after an IOS upgrade to 12.4T

[Joseph W. Doherty]

BTW, an 1841 is under powered for a 100 Mbps connection.

[hello]

Hi,

Good point! Unfortunately this is the only cisco router available at my disposal for now. That and the fact that i will only be getting about 75-80% max of my subscribed bandwidth makes me a (un)happy man.