Perle Systems IOLAN SDS - Manual (Page 63)

User Commands 63
Configuring Users
framed-compression
Used for User Service PPP or SLIP , determines whether Van Jacobsen Compression is
used on the link. VJ compression is a means of reducing the standard TCP/IP header
from 40 octets to approximately 5 octets. This gives a significant performance
improvement, particularly when interactive applications are being used. For example,
when the user is typing, a single character can be passed over the link with a packet as
small as 5 octets as opposed to 40 octets when no JV compression is used. VJ
Compression has little effect on other types of links, such as ftp, where the packets are
much larger. The Framed Compression value will be used in preference to the VJ
Compression value set for a Line . The default is Off .
framed-ip
Used for User Service PPP or SLIP , sets the IP address of the remote user. Enter the
address in dot decimal notation as follows:
z 255.255.255.254 (default)—The IOLAN will use the Remote IP Address set in
the PPP settings for the line.
z 255.255.255.255 —When the User Service is PPP , the IOLAN will allow the
remote machine to specify its IP address (overriding the Remote IP Address
configured in the line, PPP settings). When the User Service is SLIP , the IOLAN
will use the Remote IP Address set for the line (no negotiation).
z n.n.n.n —(where n is a number) Enter the IP address of your choice. This IP
address will then be used in preference to the Remote IP Address set for a line.
framed-interface-id
Used for User Service PPP , sets the IPv6 address of the remote user.
framed-mtu
Used for User Service PPP or SLIP , specifies the maximum size of packets, in bytes,
being transferred across the link. On noisy links it might be preferable to fragment large
packets being transferred over the link, since there will be quicker recovery from errors.
Depending on whether you have selected a
User Service of SLIP or PPP , details are as
follows:
z PPP — Framed MTU will be the maximum size of packets that the IOLAN port will
accept. This value is negotiated between the two ends of the link. The valid range is
64-1500. The default value is 1500 bytes.
z SLIP — Framed MTU will be the maximum size of packets being sent by the
IOLAN. The IOLAN will send SLIP packets in the range 256-1500 bytes. The
default value is 256 bytes.
The Framed MTU value will be used in preference to the MTU / MRU values set for a
Line .