Allied Telesis AT-8550 - Manual (Page 117)

AT-9108, AT-8518, AT-8525, and AT-8550 User’s Guide
7-11
IPQoS
Implementation
Rules
When using the config ipqos command, the following rules
apply:
❑ The short form of the command only accepts a unicast
.
❑ An IP addr of 0.0.0.0 /0 can be used as a wildcard unicast
destination.
❑ Unless the IntraSubnet QoS (ISQ) feature is enabled, the traffic
groupings defined within IPQoS apply to traffic being routed
(not layer 2 switched) to the destination IPQoS traffic
grouping within the switch.
❑ IPQoS does not apply to traffic that is normally handled by the
switch management processor, including ICMP traffic and
packets associated with routing protocols such as OSPF, RIP,
DVMRP, and so on.
❑ Traffic groupings on source IP addresses may utilize a variable
subnet mask when an IP multicast destination is specified, but
must be a wildcard or specific destination (32 bits of mask) if
an IP unicast destination is specified.
❑ If you are defining a grouping within IPQoS, and you are using
the other protocol option, the switch filters on the 32 bits
after the IP header.
❑ If you are defining a grouping within IPQoS, and you are using
the all protocol option, the switch creates three groupings:
one grouping for TCP, one grouping for UDP, and one
grouping for
other .
❑ The IPQoS policies are programmed when a station is added
to the forwarding database (FDB). If the station already exists
in the IP forwarding database (IPFDB), clear it so that it may be
added again using the CLI command
clear ipfdb all .