Need second ethernet port on 1751

[snootalope]

At the moment, we have a 1751 with two WIC-T1 cards, terminating to T1's. We've got them on a multi-interface giving us a total of 3MB bandwidth.. However, we're replacing it for a fiber-optic connection of 10MB. I'm being told by our ISP that the fiber will be terminated in our building and delivered to our router via a standard RJ-45 cable. Sounds easy enough.

My concern is, getting the second ethernet port on the router to support this new link and be capable of utilizing the 10MB bandwidth we'll have. Of course I have to keep the built in ethernet interface as it is..

I was looking at the WIC-4ESW card that adds four extra ethernet ports to the router, but it appears it's just a basic switch. I'm thinking that I wouldn't be able to assign an IP address to one of the four extra ports this thing would provied... Is this right?

What would be my best option here? I see there a WIC card with a single 10MB port for the 1751, but would that really give me the speeds I'm looking for to utilize the fiber? Any advice on different setups that I should consider?

 

[DallasBPF]

Why not use;

Cisco WIC-1ENET One Port Ethernet WAN Interface Card

http://www.digitalhoop.com/cisco-wic-1enet-one-port-ethernet-wan-interface-card-p31276.html

This will give you exactly what you are looking for.

------------------------------------
Dallas, Texas
Telecommunications Tech
CCVP, CCNA, Net+

CCNP in the works

 

[ADB100]

I was looking at the WIC-4ESW card that adds four extra ethernet ports to the router, but it appears it's just a basic switch. I'm thinking that I wouldn't be able to assign an IP address to one of the four extra ports this thing would provied... Is this right?

You are right that this module just provides 4 10/100 Layer-2 Ethernet ports that can't have IP addresses configured directly on them. However you can create logical SVI interfaces on the 1751 and assign the Layer-2 ports to the VLANs:

vlan 10
 name ISP-WAN
!
interface FastEthernet1/1
 switchport access vlan 10
!
interface FastEthernet1/2
 shut
!
interface FastEthernet1/3
 shut
!
interface FastEthernet1/4
 shut
!
interface vlan10
 ip address 10.1.1.1 255.255.255.0
!

You could of course use the WIC-1ENET as well. This is a 'proper' routed interface and allows you to assign an IP address directly to it.

HTH

Andy

 

[snootalope]

hmm... just learned that our 1751 has a max throughput of 6.4MB - not gonna cut it for the 10MB pipe. Probably looking at getting the Cisco 1841 as a replacement, with TWO built in ethernet ports!

 

[vipergg]

The 4 port switchcard would work . You just create a SVI like on a switch and then put the port on the switch into that vlan and you can route in and out .

 

[snootalope]

Thanks for all the info guys.. I'm gonna try and push the bosses to go with at least the 1841, simply so we know we can utilize the full 10MB fiber pipe.

If they give me the big NO, then I'll probably look to get the single port 10MB card, and just let our router utilize 70% of it's available bandwidth at the max. ugh..

 

[burtsbees]

That's MAX throughput, not counting any acl's, firewall config, etc. that the router has to process. You may be lucky to get 5MB through. Just another thing to tell the bossman...

Burt

 

[snootalope]

good point burt, I picked that up to..