LG-Ericsson iPECS ES-4526G, User Manual

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HAPTER
19
| Configuring Router Redundancy
Configuring VRRP Groups
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ES-4500G Series
◆
VLAN – ID of a VLAN configured with an IP interface. (Range: 1-4093;
Default: 1)
Adding a Virtual IP Address
◆
VLAN ID – ID of a VLAN configured with an IP interface.
(Range: 1-4093)
◆
VRID – VRRP group identifier. (Range: 1-255)
◆
IP Address – Virtual IP address for this group.
Use the IP address of a real interface on this router to make it the
master virtual router for the group. Otherwise, use the virtual address
for an existing group to make it a backup router, or to compete as the
master based on configured priority if no other members are set as the
owner of the group address.
Configuring Detailed Settings
◆ VLAN ID – VLAN configured with an IP interface. (Range: 1-4093)
◆ VRID – VRRP group identifier. (Range: 1-255)
◆ Advertisement Interval – Interval at which the master virtual router
sends advertisements communicating its state as the master.
(Range: 1-255 seconds; Default: 1 second)
VRRP advertisements from the current master virtual router include
information about its priority and current state as the master.
VRRP advertisements are sent to the multicast address 224.0.0.8.
Using a multicast address reduces the amount of traffic that has to be
processed by network devices that are not part of the designated VRRP
group.
If the master router stops sending advertisements, backup routers will
bid to become the master router based on priority. The dead interval
before attempting to take over as the master is three times the hello
interval plus half a second.
◆ Priority – The priority of this router in a VRRP group. (Range: 1-254;
Default: 100)
■
The priority for the VRRP group address owner is automatically set
to 255.
■
The priority for backup routers is used to determine which router
will take over as the acting master router if the current master fails.
◆ Preempt Mode – Allows a backup router to take over as the master
virtual router if it has a higher priority than the acting master virtual
router (i.e., a master router that is not the group’s address owner, or
another backup router that has taken over from the previous master).
(Default: Enabled)
◆ Preempt Delay Time – Time to wait before issuing a claim to become
the master. (Range: 0-120 seconds; 0 seconds)