Preparing For Configurations - Raisecom ISCOM2600G-HI (A) Series Configuration Manual

Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
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Aging time of MAC addresses
There is limit on the capacity of the MAC address table on the ISCOM2600G-HI series
switch. To maximize the use of the MAC address table, the ISCOM2600G-HI series switch
uses the aging mechanism to update the MAC address table. For example, when the
ISCOM2600G-HI series switch creates a dynamic entry, it starts the aging timer. If it does not
receive packets from the MAC address in the entry during the aging time, the ISCOM2600G-
HI series switch will delete the entry.
The ISCOM2600G-HI series switch supports automatic aging of MAC addresses. The aging
time ranges from 10s to 1000000s and can be 0. The value 0 indicates no aging.
The aging mechanism takes effect on dynamic MAC addresses.
Forwarding policies of MAC addresses
The MAC address table has two forwarding policies:
When receiving packets on an interface, the ISCOM2600G-HI series switch searches the
MAC address table for the interface related to the destination MAC address of packets.
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MAC address limit
The MAC address limit is used to limit the number of MAC addresses, avoid extending the
searching time of forwarding entry caused by a too large MAC address table and degrading
the forwarding performance of the Ethernet switch, and it is effective to manage the MAC
address table.
The MAC address limit improves the speed of forwarding packets.

2.1.2 Preparing for configurations

Scenario
Configure the static MAC address table in the following situations:
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static address entry manually can reduce the network broadcast flow, improve the
security of the interface, and prevent entries from being lost after the system is reset.
Dynamic MAC address entry: the ISCOM2600G-HI series switch can add dynamic
MAC address entries through MAC address learning. The entries are aged according to
the configured aging time, and will be empty after the system is reset.
If successful, it forwards packets on the related interface, records the source MAC
addresses of packets, interface number of ingress packets, and VLAN ID in the MAC
address table. If packets from other interface are sent to the MAC address, the
ISCOM2600G-HI series switch can send them to the related interface.
If failed, it broadcasts packets to all interfaces except the source interface, and records
the source MAC address in the MAC address table.
The static MAC address can be configured for a fixed server, special persons (manager,
financial staff), fixed and important hosts to ensure that all data flow forwarding to these
MAC addresses are forwarded from static MAC address related interface in priority.
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