
Chapter 4 Configuring Interfaces
Configuring the ATM Uplink Interface (Catalyst 8540)
Table 
| Parameter | Configuration Command | Default Value | 
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| Transmit clock source | [no] atm clock internal | no internal (line) | 
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| Cisco Discovery Protocol (CDP) | [no] cdp enable | CDP enabled | 
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| ATM VCs per VP | atm  | 1024 | 
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In addition, the ATM uplink interface uses the 
Table 
| Parameter | Value | 
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| Transmit buffers for segmentation and reassembly | 8192 | 
| (SAR) | 
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| Receive buffers for SAR | 8192 | 
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| Maximum VCs | 8192 | 
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| ATM AAL | AAL5 | 
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| ILMI keepalives | Not supported | 
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Initially Configuring the ATM Uplink Interface
You should configure the following properties for a newly installed ATM uplink interface:
•IP routing
•IP address
To initially configure the ATM uplink interface, perform the following steps, beginning in global configuration mode:
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 | Command | Purpose | 
| Step 1 | 
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| Router(config)# ip routing | Enables IP routing. | |
| Step 2 | 
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| Router(config)# interface atm | Enters interface configuration mode and specifies the ATM | |
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 | slot/subslot/interface | interface to configure. | 
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| Step 3 | 
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| Assigns an IP address and subnet mask to the interface. | ||
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| Step 4 | 
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| Specifies the internal clock for the interface. The default mode | ||
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 | internal | for the clock is no internal, which is the same as the line clock. | 
| Step 5 | 
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| Enables the interface with the previous configurations. | ||
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 | Layer 3 Switching Software Feature and Configuration Guide | 
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