Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH 사용자 설명서
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Chapter 5. Configuring Slots and Ports on a Switch
NETGEAR 8800 User Manual
Software-Controlled Redundant Port and
Smart Redundancy
Smart Redundancy
Using the software-controlled redundant port feature you can back up a specified Ethernet
port (primary) with a redundant, dedicated Ethernet port; both ports are on the same switch. If
the primary port fails, the switch will establish a link on the redundant port and the redundant
port becomes active. Only one side of the link must be configured as redundant because the
redundant port link is held in standby state on both sides of the link. This feature provides
very fast path or network redundancy.
port (primary) with a redundant, dedicated Ethernet port; both ports are on the same switch. If
the primary port fails, the switch will establish a link on the redundant port and the redundant
port becomes active. Only one side of the link must be configured as redundant because the
redundant port link is held in standby state on both sides of the link. This feature provides
very fast path or network redundancy.
Note:
You cannot have any Layer 2 protocols configured on any of the
VLANs that are present on the ports.
Smart Redundancy is a feature that allows control over how the failover from a redundant
port to the primary port is managed. If this feature is enabled, which is the default setting, the
switch attempts to revert to the primary port as soon as it can be recovered. If the feature is
disabled, the switch attempts only to recover the primary port to active if the redundant port
fails.
port to the primary port is managed. If this feature is enabled, which is the default setting, the
switch attempts to revert to the primary port as soon as it can be recovered. If the feature is
disabled, the switch attempts only to recover the primary port to active if the redundant port
fails.
A typical configuration of software-controlled redundant ports is a dual-homed
implementation (
implementation (
). This example maintains connectivity only if the link between
switch A and switch B remains open; that link is outside the scope of the software-controlled
port redundancy on switch C.
port redundancy on switch C.
Figure 4. Dual-Homed Implementation for Switch C
In normal operation, the primary port is active and the software redundant switch (switch C in
) blocks the redundant port for all traffic, thereby avoiding a loop in the network. If the
switch detects that the primary port is down, the switch unblocks the redundant port and
allows traffic to flow through that redundant port.
allows traffic to flow through that redundant port.
Note:
The primary and redundant ports must have identical VLAN
membership.
Switch B
Switch A
Redundant
Link
Link
Primary
Link
Switch C
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