Allied Telesis AT-9900 Series Release Note page 10

CR Module
CR00011855 TCP,
UPnP
CR00011940 Switch
CR00011991 WAN load
balancer
CR00011992 Firewall
Version 276-03
C613-10474-00 REV B
Level
2 TCP sessions would sometimes "hang" in the Close Wait state. This behaviour
occurred when a UPnP notification session was closed by the control point
(usually Windows XP, SP2), via a "200 OK" message that contained a
"Connection: close" field, that also had the TCP/FIN flag set.
Because these TCP sessions were not closing, eventually all available TCP
resources could be used up, preventing new TCP sessions from opening.
This issue has been resolved. Such TCP sessions now close correctly.
2 Previously, if all configured IP interfaces were down or had been deleted,
broadcast frames were not sent to the switch's CPU. This meant, for example,
that VLANs on the switch did not receive PPPoE traffic if all IP interfaces were
down.
2 An issue occurred when the router accessed multiple WAN load balancer
healthcheck hosts, and was configured as a firewall that performed enhanced
NAT. Instead of testing the health of each healthcheck host through every WAN
LB resource (and therefore over all relevant WAN interfaces), the router only
tested through one WAN LB resource. If that one WAN interface lost connectivity
to the Internet, the WAN LB incorrectly thought that all WAN LB resources had
become unavailable.
This issue has been resolved. The WAN LB now correctly checks the health of all
healthcheck hosts through all WAN LB resource interfaces.
2 When the firewall was enabled, it failed to process some RTSP packets, so clients
behind the firewall failed to load some web pages that used RTSP (TCP port
7070).
This issue has been resolved.
Description
Features in 276-02
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