D-Link DI-1750 Reference Manual page 195

buffer for ICMP messages or broadcasting messages in that generally these messages won't be sent
out continuously. If buffer memory is not enough to use, it will be deleted by timeout.
Maybe Fast Exchange is not relevant to use for transmitting from high speed medium to low speed
cable (64k or even lower). Because it will quicken the transmitting speed with the result that messages
overstock on the low speed interface and more messages are discarded. In that case, IP Fast
Exchange should be forbidden on the low speed interface. System will proportion load according to
source address / destination address. If there are various network routes existing, Fast Exchange
ensures that messages with the same source address / destination address use the same route and
that messages with different source address / destination address use various route to transmit
respectively, Thus the router proportion the load.
Use commands below in interface configuration status to allow or forbid the Fast Exchange:
ip route-cache
ip（undo） route-cache
In the prompt select ip option ，it will list all arguments.
U(undo) D(default) Q(quit)
(00)access-group
......
(13)route-cache
......
Please Input the code of command to be excute(0-18): 13
input 13，Selectroute-cache option ，prompt is as below:
(00)same-interface
(01)<cr>
Please Input the code of command to be excute(0-1): 1
input 1，it will enable fast exchange.
If you select ip option in prompt，please first input D or d，the Select route-cache，finally Select 1，it will disable
fast exchange.
8. Allow IP Fast Exchange on the Same Interface
User can allow IP Fast Exchange on the same interface, i.e. the interface accepting and transmitting
are the same interface. Commonly we suggest that the function don't be opened in that it collides with
redirection function in the router. If you have a network of incomplete connection such as frame relay,
you can open this function on the frame relay interface. For example, router A, router B and router C
constitute a frame relay network, but only the two partners A-B and B-C exist physical link.
Communications between A and C must be relayed by B: A-B-C. B gets messages from A through a
DLCI on the interface and transmits them to C through another DLCI on the same interface.
Use command below in interface configuration status to allow IP Fast Exchange on the same interface:
ip route-cache same-interface
In the prompt select ip option ，it will list all arguments.
(00)access-group
......
(13)route-cache
......
Please Input the code of command to be excute(0-18): 13
input 13，Selectroute-cache option ，prompt is as below:
(00)same-interface
Command
Specify access control for packets
Enable fast-switching cache for outgoing packets
Enable fast-switching on the same interface
Command
Specify access control for packets
Enable fast-switching cache for outgoing packets
Enable fast-switching on the same interface
Model Name
Function
Allow Fast Exchange (Relay IP messages with routing
buffer).
Forbid Fast Exchange and system will proportion the
load for each message.
Function
Allow IP messages whose transmitting interface and
accepting interface are the same interface.
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