ZyXEL Communications IES-1248-51A, User Manual

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Chapter 13 Switch Setup
IES-1248-51V User’s Guide
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Join Timer Join Timer sets the duration of the Join Period timer for GVRP in
milliseconds. Each port has a Join Period timer. The allowed Join Time
range is between 100 and 65535 milliseconds; the default is 200
milliseconds.
Leave Timer Leave Timer sets the duration of the Leave Period timer for GVRP in
milliseconds. Each port has a single Leave Period timer. Leave Time
must be two times larger than Join Timer; the default is 600
milliseconds.
Leave All Timer Leave All Timer sets the duration of the Leave All Period timer for
GVRP in milliseconds. Each port has a single Leave All Period timer.
Leave All Timer must be larger than Leave Timer.
Port Isolation
Active
Turn on port isolation to block communications between subscriber
ports. When you enable port isolation you do not need to configure
the VLAN to isolate subscribers.
MAC Anti-
Spoofing
Active
Turn on MAC anti-spoofing to monitor for and prevent MAC address
“spoofing” by malicious parties.
Switch Mode Select Standalone to use both of the IES-1248-51V’s Ethernet ports
(ENET 1 and ENET 2) as uplink ports.
Note: Standalone mode is recommended for network topologies
that use loops.
Use Daisychain mode to cascade (daisychain) multiple IES-1248-
51V. The IES-1248-51V uses Ethernet port one (ENET 1) as an uplink
port to connect to the Ethernet backbone and uses Ethernet port two
(ENET 2) to connect to another (daisychained or subtending) IES-
1248-51V.
Note: Daisychain mode is recommended for network topologies
that do not use loops.
Priority Queue
Assignment IEEE 802.1p defines up to 8 separate traffic types by inserting a tag
into a MAC-layer frame that contains bits to define class of service.
Frames without an explicit priority tag are given the default priority of
the ingress port. Use the next two fields to configure the priority
level-to-physical queue mapping.
The device has 4 physical queues that you can map to the 8 priority
levels for outgoing Ethernet traffic. The device has 8 physical queues
that you can map to the 8 priority levels for outgoing ADSL traffic.
Traffic assigned to higher index queues gets through the device faster
while traffic in lower index queues is dropped if the network is
congested.
Priority Level The following descriptions are based on the traffic types defined in the
IEEE 802.1d standard (which incorporates IEEE 802.1p).
Priority 7 Typically used for network control traffic such as router configuration
messages.
Priority 6 Typically used for voice traffic that is especially sensitive to jitter
(jitter is the variations in delay).
Table 16 Switch Setup (continued)
LABEL DESCRIPTION