Cisco 850 - multiple LAN subnets per FastEthernet

Answered Question
Sep 9th, 2008

Hi all;

Can anyone please tell me whether they know if the Cisco 850's support configuring different LAN IP subnets, per FastEthernet switch port? I worked with a Cisco 837 which couldn't (although enabling the DMZ functionality did give extra segment).

PS. If it can't, how about the Cisco 870's?-

Thank you

I have this problem too.
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Correct Answer by alalli about 8 years 4 months ago

Hi Michael,

Here is a link to the config guide for 850/870 routers.

http://www.cisco.com/en/US/docs/routers/access/800/850/software/configuration/guide/dhcpvlan.html

Basically, what you need to do is to

1. create the vlan database

router1(config)#vlan database

2. create layer 2 vlans

router1(config)#vlan 2 name network_mgmt

router1(config)#vlan 3 name data

router1(config)#vlan 4 name voice

3. Assign L2 vlans to a port on the switch.

router1(config)#

int Fast2

switchport access vlan 2

int Fast3

switchport access vlan 3

int Fast4

switchport access vlan 4

4. create layer 3 vlan interfaces for routing.

int vlan 2

ip address 192.168.2.254 255.255.255.0

no shut

int vlan 3

ip address 192.168.3.254 255.255.255.0

no shut

int vlan 4

ip address 192.168.4.254 255.255.255.0

no shut

Hope this helps :)

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Correct Answer
alalli Wed, 09/10/2008 - 15:42

Hi Michael,

Here is a link to the config guide for 850/870 routers.

http://www.cisco.com/en/US/docs/routers/access/800/850/software/configuration/guide/dhcpvlan.html

Basically, what you need to do is to

1. create the vlan database

router1(config)#vlan database

2. create layer 2 vlans

router1(config)#vlan 2 name network_mgmt

router1(config)#vlan 3 name data

router1(config)#vlan 4 name voice

3. Assign L2 vlans to a port on the switch.

router1(config)#

int Fast2

switchport access vlan 2

int Fast3

switchport access vlan 3

int Fast4

switchport access vlan 4

4. create layer 3 vlan interfaces for routing.

int vlan 2

ip address 192.168.2.254 255.255.255.0

no shut

int vlan 3

ip address 192.168.3.254 255.255.255.0

no shut

int vlan 4

ip address 192.168.4.254 255.255.255.0

no shut

Hope this helps :)

alalli Wed, 09/10/2008 - 15:42

Hi Michael,

Here is a link to the config guide for 850/870 routers.

http://www.cisco.com/en/US/docs/routers/access/800/850/software/configuration/guide/dhcpvlan.html

Basically, what you need to do is to

1. create the vlan database

router1(config)#vlan database

2. create layer 2 vlans

router1(config)#vlan 2 name network_mgmt

router1(config)#vlan 3 name data

router1(config)#vlan 4 name voice

3. Assign L2 vlans to a port on the switch.

router1(config)#

int Fast2

switchport access vlan 2

int Fast3

switchport access vlan 3

int Fast4

switchport access vlan 4

4. create layer 3 vlan interfaces for routing.

int vlan 2

ip address 192.168.2.254 255.255.255.0

no shut

int vlan 3

ip address 192.168.3.254 255.255.255.0

no shut

int vlan 4

ip address 192.168.4.254 255.255.255.0

no shut

Hope this helps :)

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