Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

ATM circuits going to Ethernet traffic

We have a 3662 router with an ATM card in it and 3 ethernet ports. The ATM had about 100 sub interfaces on it, and most of the regional sites are allowed to connect to just one of the networks on the ethernet side (say port 1). We have 1 ATM subinterface which maps to the second ethernet port, and another ATM subinterface maps to the third ethernet port.

We could consider it as three different customers using the same device to help describe the network layout and requirements. Traffic from one customer should not be able to get to the other customers network and vice versa. The ATM connections are either to frame circuits or to a layer 2 LAN service.

OSPF is running on the box on all subinterfaces to provide the routing informaiton to the regional sites.

We were thinking of using access lists to prevent traffic from being crossed over from network to network and wanted to see if there might be a better way of doing this.

An example of a layer 2 LAN service sub int on the ATM is as follows

interface ATM1/0.432 point-to-point

description Connection to #12345

bandwidth 10000

ip address 10.250.2.170 255.255.255.248

pvc farend 4/32

ubr 10000

inarp 10

broadcast

encapsulation aal5snap

!

Any suggestions?

  • Other Network Infrastructure Subjects
1 REPLY
Cisco Employee

Re: ATM circuits going to Ethernet traffic

Access-lists could be a solution. You could use also policy-routing. The last solution is to configure VRFs on the router and include the interfaces which are from the same "customer" in the same VRF.

92
Views
0
Helpful
1
Replies
This widget could not be displayed.