Ascend Archive
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Re: (ASCEND) Re-iterate: 6.1.3 does NOT fix IP address pool leak
At 22:51 1998/06/26 -0500, Jim Logan wrote:
>This is off my recent upgrade to 6.1.3, and actually rebooted 1 hour ago
>before I left the Site. Single Max 4048, we accept ISDN MPP on the unit, 31
>users logged in right now out of 48 (47 since PRI) available:
>
>
>Pool# Base Count InUse
> 1 207.239.221.21 48 33
>
> Number of remaining allocated addresses: 0
I was watching log files friday night and was able to catch
the pool leak in the act...
When the pool has leaked to empty I got this:
Login: jhoward
Password:
PPP: No IP Pool assigned.
------
A normal display after a user disconnected, freeing an address:
Login: jhoward
Password:
Entering PPP Mode.
IP address is 205.142.31.10
MTU is 1524.
------
this "remaining allocated" is where my missing addresses went,
the "InUse" number seems to be right:
(the pool shown is a different block than the one that leaked,
I replaced the old block with this one to avoid rebooting)
ascend% sh pool
Pool# Base Count InUse
1 206.71.7.193 62 36
Number of remaining allocated addresses: 31
------
and finally the cause of the leak, a user who is authorised
to login with only a single channel, single IP, 64k PPP link
bought a new 3COM router for home and was trying to connect at 128k.
his router was configured for NAT, and was dialing us twice to get 128k,
and then when we dropped the second channel his router dropped the first one,
his IP address shows up in both disconnect messages and then goes to limbo
never to be used again. within minutes this user alone had eaten 30 addresses.
Jun 26 22:22:25 : slot 0 port 0, line 1, channel 8, Incoming Call, yyy0543
[MBID 96; ]
Jun 26 22:22:25 : slot 9 port 7, Assigned to port, yyy0543 [MBID 96; ]
Jun 26 22:22:27 : slot 9 port 7, line 1, channel 8, Call Connected, yyy0543
[MBID 96; ]
Jun 26 22:22:27 : call 25 AN slot 9 port 7 64K xxx2007
Jun 26 22:22:28 : slot 9 port 7, LAN session up, chas [MBID 96; ]
Jun 26 22:22:41 : slot 0 port 0, line 1, channel 9, Incoming Call, yyy4606
[MBID 97; ]
Jun 26 22:22:41 : slot 9 port 9, Assigned to port, yyy4606 [MBID 97; ]
Jun 26 22:22:43 : slot 9 port 9, line 1, channel 9, Call Connected, yyy4606
[MBID 97; ]
Jun 26 22:22:43 : call 27 AN slot 9 port 9 64K xxx2007
Jun 26 22:22:47 : slot 9 port 9, Call Terminated [MBID 97; ]
Jun 26 22:22:47 : call 27 CL 0K u=chas c=49 p=65 s=64000 r=64000
h=205.142.31.4
Jun 26 22:22:48 : call 25 CL 0K u=chas c=45 p=60 s=64000 r=64000
h=205.142.31.4
Jun 26 22:22:48 : slot 9 port 7, line 1, channel 8, Call Disconnected [MBID
96; ]
Jun 26 22:22:48 : slot 9 port 7, Call Terminated [MBID 96; ]
Jun 26 22:22:48 : slot 0 port 0, LAN session down, chas [MBID 96; ]
----
Jim Howard Sr Network Engineer Lyceum Internet
jhoward@lyceum.com http://www.lyceum.com/ 404.248.1733
My PGP Public Key: http://www.lyceum.com/~jhoward/pgp-key.txt
Fingerprint: 7E8B E2BA 1314 2535 CB08 CFF9 119B 7CD3 2488 954D
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