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Title: ISDN: extremely slow connections

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ISDN: extremely slow connections
Applicable to
S.u.S.E. version: 4.4.1
Kernel version: 2.0.29
HiSax version: 1.5
Symptom:
A rawip-HDLC connection works normal. But with single sessions (ftp,
telnet, ...) the connection gets extremely slow (a ls -l
can take up to 15 minutes).
If one starts a second connection (ftp, telnet, ...) one can however work
with normal speed.
Cause:
The HiSax driver has problems under certain circumstances with large
MTU's (Maximum Transfer Units)
Solution:
Declare on both sides the MTU explicitly (in /etc/rc.config
)
e.g.:
IFCONFIG_1="192.168.102.1 pointopoint 192.168.230.1 mtu 256"
Hint:
This was, up to now, only observed in veeery slow computers (486, 8MB).
Feedback is highly welcome!

See also:

Keywords: ISDN, MTU, RAWIP, FTP, THROUGHPUT

Feedback welcome: Send Mail to kfr@suse.de (Please give the following subject: SDB-isdn_mtu
)

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SDB-isdn_mtu, Copyright SuSE GmbH, Nuremberg, Germany
- Version: 19. Mar 1997
SuSE GmbH - Last generated: 07. Oct 1999 16:42:55
by maddin
with sdb_gen 1.00.0