01-31-2006 01:22 PM - edited 03-03-2019 11:37 AM
I have a 3745 router that connects to remote branches via point to point T1s. I want to replace P2P with 10/100 Ethernet. 2 FE ports on board are being used. I want to add a NM-16ESW module to provide additional Ethernet connections.
My question is "can I configure each port on the NM-16ESW module as a routed port so that I can connect each remote site to the FE port on the switch module?" The way I read, I should be able to do this using SVI. Can anyone confirm this?
I greatly appreciate your response.
Thanks in advance.
H. Wilson.
01-31-2006 01:51 PM
Howdy,
The way I would do this is to configure a separate VLAN for each port (using 'switchport access vlan') and then configure a separate SVI (interface vlanx) for each VLAN e.g.
interface fast0/0/0
switchport access vlan 100
interface fast0/0/1
switchport access vlan 101
interface fast0/0/2
switchport access vlan 102
interface fast0/0/3
switchport access vlan 103
!
interface vlan100
ip address....
interface vlan101
ip address....
interface vlan102
ip address....
interface vlan103
ip address....
Hope that helps - pls rate posts that help.
Regards,
Paresh
02-01-2006 05:08 AM
Thanks Paresh. One additional question. I am assuming that when I do this I need to add vlan subnets in my routing protocol. For example, let's say the vlan100 is in 172.100.x.x network and I use rip routing protocol. So I should have
router rip
network 172.100.x.x
Is it correct?
Thanks for your help in advance.
HYW.
02-01-2006 06:55 AM
Yes, you are very correct.
02-01-2006 12:08 PM
G'day,
That is absolutlely correct. Treat the VLAN interfaces as standard layer 3 interfaces ..therefore,just include their subnets within the network commands of all routing protocols that you wish to run.
Hope that helps - pls rate the post if it does.
Paresh
02-01-2006 01:20 PM
H.Wilson,
With newer IOS;es, you necessarily dont need to create vlans and then assign vlans to the ports and assign ip addresses to the vlan interfaces to get layer 3 routing on each port. You can do a "no switchport" directly under the fast E ports of the module and this command configures the switch port as a Layer 3 port. Take a look at this FAQ
http://www.cisco.com/en/US/products/hw/modules/ps2643/products_qanda_item09186a00802c9e7a.shtml
You can also enable routing protocols on these ports, just like you do with other interfaces.
HTH
PS: Please remember to rate helpful replies!
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