Supported routes
Digi TransPort User Guide
350
Routing modes
The TransPort has two routing modes available, these are:
•
TransPort routing mode
: This is the original routing method and may be seen on existing
installations.
• CIDR routing mode:
Now enabled by default on new TransPort routers.
The CLI command to switch between the two modes is:
ip 0 cidr [off|on]
TransPort routing mode
When you enable the TransPort routing mode, CIDR routing is disabled.
When the TransPort receives an IP packet to route, the routing table is used to decide through
which interface to send the packet.
Usually the destination IP address of the IP packet is compared with the IP Address and Mask of
each entry in the routing table in index order, regardless of the order in the routing table or
length of mask.
There may be more than one match, and in this case, the index number of the route is taken into
account. The index number is simply the route number in the config. That is, Static Route 0 or 1 is
index
0
or
1
.
Static routes are checked first, then dynamic routes, then default routes.
CLI command:
ip 0 cidr off
CIDR routing mode
When the TransPort receives an IP packet to route, the routing table is used to decide through
which interface to send the packet.
Usually the destination IP address of the IP packet is compared with the IP Address and Mask of
each entry in the routing table.
There may be more than one match and in this case the most specific route is used to route the
packet. Such as, a matching
/24
route is used before a matching
/16
route.
If multiple routes match the destination and have the same prefix length, the index number of
the routes in the routing table is used to determine the route.
CLI command: ip 0 cidr on
