ip addressing

[samram]

how to use 5 static ip address with single cisco 2620xm router for t1 connection ?,
how to configure these 5 static address with nat ?

[gabrielshorn]

First, make an standard access list that defines your inside NAT address space:

access-list 10 permit 10.1.1.0 0.0.0.255

On the serial interface:

ip nat outside

On the internal interface:

ip nat inside

Let's say 192.168.100.20 - 192.168.100.24 are your five addresses and they're part of a /28 network. In global config mode:

ip nat pool MYNATPOOL 192.168.100.20 192.168.100.24 netmask 255.255.255.240
ip nat inside source list 10 pool MYNATPOOL

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This method will use all five addresses dynamically as they are needed.