Igmp Snooping; Bandwidth Control; Quality Of Service - ZyXEL Communications IES-1248-51 User Manual

IES-1248-51 User's Guide
MAC (Media Access Control) Count Filter
You can limit the number of MAC addresses that may be dynamically learned on a port. You
may enable/disable the MAC count filter on individual ports.
Static Multicast
Use static multicast to allow incoming frames based on multicast MAC address(es) that you
specify. This feature can be used in conjunction with IGMP snooping and IGMP proxy to
allow multicast MAC address(es) that are not learned by IGMP snooping or IGMP proxy.
IGMP Proxy
In a simple tree network, the system can proxy multicast traffic in order to improve network
performance.

IGMP Snooping

With IGMP snooping, group multicast traffic is only forwarded to ports that are members of
that group. IGMP Snooping generates no additional network traffic, allowing you to
significantly reduce multicast traffic passing through your IES-1248-51.
System Monitoring
• System status (link status, rates, statistics counters)
• Temperatures, voltage reports and alarms.
System Error Logging
The IES-1248-51's system error log will record error logs locally. These logs may be viewed
again after a warm restart.
Alarm LED
An ALM (alarm) LED lights when the IES-1248-51 is overheated, the fans are not working
properly, the voltage readings are outside the tolerance levels or an alarm has been detected on
the ALARM input pins.

Bandwidth Control

The IES-1248-51 supports rate limiting in 32 Kbps increments allowing you to create different
service plans

Quality of Service

• Four priority queues for ENET and eight priority queues for downstream PVC so you can
ensure mission-critical data gets delivered on time.
• Follows the IEEE 802.1p priority setting standard.
40 Chapter 1 Getting to Know the IES-1248-51