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250 CHAPTER 17: CONFIGURING FRAME RELAY
N392, the DTE equipment will assume that the number of errors reaches the
threshold, and will regard the physical path and all the virtual circuits as unusable.
The parameters at the DCE side include:
■ T392DCE: Define the longest duration for the DCE equipment to wait for a
status enquiry message. It should be larger than T391.
■ N392DCE: The threshold for the errors that can occur in the total number of
observed events at the DCE side.
■ N393DCE: The total number of observed events at the DCE side.
It should be noted that N392 should be no larger than N393 and T391DTE should
be smaller than its peer T392DCE.
5 Configure Frame Relay Address Mapping
Frame Relay address mapping means to establish the mapping between the peer
protocol address and the local DLCI. Address mapping of Frame Relay can either
be configured statically or set up dynamically.
a Configure Frame Relay static address mapping
Static configuration means the manual setup of the mapping relation between
the peer protocol address and local DLCI, and is usually applied when there are
few peer hosts or there is a default route.
In interface view, perform the following task to configure the Frame Relay
static address mapping.
Table 279 Configure Frame Relay static address mapping
By default, the dynamic inverse arp is enabled on all the interfaces.
After the Frame Relay static address mapping is configured, the dynamic
inverse arp will be disabled automatically on the specified DLCI.
b Configure Frame Relay dynamic inverse arp
Dynamic configuration means the mapping peer protocol address and local
DLCI dynamically after running the inverse address resolution protocol (Inverse
ARP), which is applicable when the peer router also supports the "inverse
address resolution protocol" and network is complex.
In interface view, perform the following task to configure the dynamic inverse
arp of Frame Relay.
Table 280 Configure Frame Relay dynamic address mapping
By default, the dynamic inverse arp is enabled on the interface.
Operation Command
Add a static address mapping fr map { ip | ipx } protocol-address dlci
dlci [ broadcast ] [ nonstandard | ietf ]
[ logic-channel channel_number ] [
nocompress | compression vj ] [
compression frf9 ]
Delete a static address mapping undo fr map { ip | ipx } protocol-address
dlci dlci
Operation Command
Enable dynamic address mapping fr inarp [ { ip | ipx } [ dlci ] ]
Disable dynamic address mapping undo fr inarp [ { ip | ipx } [ dlci ] ]