Configuring Asynchronous Lines and Interfaces
Configuration Examples for Asynchronous Interfaces and Lines
DC-41
Cisco IOS Dial Technologies Configuration Guide
Asynchronous Routing and Dynamic Addressing Configuration Example
The following example shows a simple configuration that allows routing and dynamic addressing.
With this configuration, if the user specifies /routing in the EXEC slip or ppp command, routing
protocols will be sent and received.
interface async 6
async dynamic routing
async dynamic address
TCP Header Compression Configuration Example
The following example configures asynchronous interface 7 with a default IP address, allowing header
compression if it is specified in the slip or ppp connection command entered by the user or if the
connecting system sends compressed packets.
interface async 7
ip address 172.31.79.1
async default ip address 172.31.79.2
ip tcp header-compression passive
Network Address Conservation Using the ip unnumbered Command Example
The following example shows how to configure your router for routing using unnumbered interfaces.
The source (local) address is shared between the Ethernet 0 and asynchronous 6 interfaces (172.18.1.1).
The default remote address is 172.18.1.2.
interface ethernet 0
ip address 172.18.1.1 255.255.255.0
!
interface async 6
ip unnumbered ethernet 0
async dynamic routing
! Default address is on the local subnet.
async dynamic address
async default ip address 172.18.1.2
ip tcp header-compression passive
The following example shows how the IP unnumbered configuration works. Although the user is
assigned an address, the system response shows the interface as unnumbered, and the address entered by
the user will be used only in response to BOOTP requests.
Router> slip /compressed 10.11.11.254
Password:
Entering async mode.
Interface IP address is unnumbered, MTU is 1500 bytes.
Header compression is On.
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