Cisco ROUTER-SDM-CD User Manual page 157

Chapter 6 Edit Interface/Connection
Tunnel Source
Tunnel Destination
Tunnel IP Address
GRE Keepalive Check Box
Maximum Transmission Unit
Bandwidth
OL-4015-12
Choose the interface that the tunnel will use. This interface must be reachable
from the other end of the tunnel; therefore, it must have a public, routable
address.
The tunnel destination is the interface on the router at the other end of the tunnel.
Choose whether you will specify an IP address or a hostname, and then enter that
information. If you chose IP address, provide the IP address and subnet mask in
dotted decimal format; for example, 192.168.20.1 and 255.255.255.0.
Make sure that this address or hostname is reachable using the ping command;
otherwise, the tunnel will not be properly created.
Enter the IP address of the tunnel in dotted decimal format; for example,
192.168.20.1. For more information, see
Check if you want the router to send GRE keepalives. Specify the interval, in
seconds, that keepalives will be sent, and the waiting period, in seconds, between
retries.
Enter the maximum transmission unit (MTU) size. If you want the size adjusted
to a lower value when the adjustment would avoid packet fragmentation, click
Adjust MTU to avoid fragmentation.
Click to specify the bandwidth for this tunnel in kilobytes.
Cisco Router and Security Device Manager 2.5 User's Guide
Add or Edit GRE Tunnel
IP Addresses and Subnet
IP
Masks.
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