Specifications

C-6
Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Appendix C Supporting and Using Additional CLI Access Options
Setting Up ATM WAN Connections
Figure C-4 Hardware Required for an ATM WAN Connection
The workstation in Figure C-4 uses a LAN to connect to a router that supports both LAN and ATM
interfaces. An IP address is assigned to an ATM interface in each Cisco MGX 8850. To manage an
MGX 8850, the workstation operator configures a network management program to communicate with
the IP address assigned to the ATM interface. Network managers can use the following tools to manage
the switch:
• CLI using a Telnet session
• CWM
• Third-party SNMP manager
To support the ATM SVCs over which the IP traffic travels, both the router and switch are configured to
map the respective IP addresses to ATM End Station Addresses (AESAs). When a management session
is initiated, the IP workstation directs all communications to the IP address assigned to the ATM
interface on the switch. The router encapsulates this IP traffic in ATM cells and forwards it over SVCs
to the switch. The destination switch retrieves the IP messages from the ATM cells and forwards them
to the internal IP management tools. Replies to the workstation follow the same path in reverse.
This feature provides maximum flexibility for switch management. Any workstation with a connection
to a properly configured ATM router can manage any switch in the network. Furthermore, additional
routers connected to other switches can be configured to support this feature, enabling switch
configuration from multiple locations throughout an ATM network.
Configuring the Switch
To support IP connectivity over the ATM interface, you need to do the following tasks:
1. Assign an IP address to the ATM interface.
2. Assign an AESA to the ATM interface.
3. Define an AESA for every adjacent router that supports IP communications to the ATM interface.
4. Configure ATM communications between the switch and the router.
Core ATM
network
Cisco
MGX 8850
ATM SVCs
ATM SVCs
ATM router
(Cisco or third-party)
IP workstation
IP over Ethernet LAN
Cisco
MGX 8850
38666