Configuring The Keep-Alive Interval; Enabling Fragmentation - Patton electronics SmartNode Series Software Configuration Manual

15 • Serial port configuration
Configuring the keep-alive interval
A keep-alive interval must be set to configure the LMI. By default, this interval is 10 seconds and, according to
the LMI protocol, must be less than the corresponding interval on the switch. The keep-alive interval in sec-
onds, which is represented by number, has to be in the range from 1 to 3600.
This procedure describes how to set the keep-alive interval
Mode: Frame Relay
Step
1 node (frm-rel)[ slot/port ]#keepalive number
To disable keep-alives on networks that do not utilize LMI, use the no keepalive interface configuration command.
Example: Configuring the keep-alive interval
The following example sets the keepalive interval to 10 seconds for Frame Relay over the serial interface on slot
0 and port 0 of a SmartNode.
SN(cfg)#port serial 0 0
SN(prt-ser)[0/0]#framerelay
SN(frm-rel)[0/0]#keepalive 10

Enabling fragmentation

The SmartWare supports the FRF.12 interface and end-to-end fragmentation of large IP packets to reduce the
delay imposed on voice packets on slow links (less than 512 kbps). As opposed to IP fragmentation (also sup-
ported by SmartWare) Frame Relay fragmentation is transparent to the IP layer. This leaves IP packets
unchanged, which may be important for IP-based applications susceptible to IP fragmentation.
This procedure describes how to enable Frame Relay fragmentation
Mode: Frame Relay
Step Command
1 node (cfg)#port serial slot port
node (prt-ser)[ 0/0 ]#framerelay
2
node (frm-rel)[ 0/0 ]#use profile
3
service-policy name out
4 node (frm-rel)[ 0/0 ]#fragment size Defines the maximum size (in Bytes) of the Frame Relay pay-
5 node (frm-rel)[ 0/0 ]#pvc dlci
6 node (pvc)[ dlci ]#fragment size
176
Command
Selects the serial interface on slot and port.
Enters Frame Relay configuration mode.
Uses the previously defined service policy profile on Frame
Relay layer (and not on IP interface level) in outward direc-
tion.
load (excluding Frame Relay header and trailer overhead)
for all PVCs (FRF.12 interface fragmentation).
See also the table below
Enters the PVC configuration mode by assigning a DLCI num-
ber to be used on the specified virtual circuit.
Defines the maximum size (in bytes) of the Frame Relay pay-
load (excluding Frame Relay header and trailer overhead)
for this PVC only (FRF.12 end-to-end fragmentation).
See also the table below
SmartWare Software Configuration Guide
Purpose
Sets the LMI keep-alive interval
Purpose
Serial port configuration task list