Avaya Media Gateway G250, Руководство администратора

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Configuring the router
544 Administration for the Avaya G250 and Avaya G350 Media Gateways
There is one main router on IP subnet 20.20.20.0, such as a G350, C363T, C364T, or any router
that supports VRRP, and a backup router. You can configure more backup routers.
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The G250/G350 itself must have an interface on the IP subnetwork, for example,
20.20.20.2
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Configure all the routers under the same VRID, for example,1. You must configure the
routers per VLAN.
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An assigned VRID must not be used in the network, even in a different VLAN
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When router configuration is complete and the network is up, the main router for each
virtual router is selected according to the following order of preference:
- The virtual router IP address is also the router’s interface IP address
- It has the highest priority (you can configure this parameter)
- It has the highest IP address if the previous conditions do not apply
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The virtual router IP address needs to be configured as the default gateway on the stations
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The Main router advertises a six-byte Virtual MAC address, in the format
00.00.5E.00.01.02 VRID, as a response to the stations’ ARP requests
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The redundant router uses a VRRP polling protocol to check the Main router integrity at
one-second intervals (default). Otherwise, it is idle.
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If the Main router fails, the redundant router that does not receive a response from four
consecutive polling requests (default) takes over and starts to advertise the same Virtual
MAC for ARP requests. Therefore, the stations will not detect any change either in the
configured default gateway or at the MAC level.
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VRRP has no provisions for routing database synchronization among the redundant
routers. You must perform this manually, if needed.
VRRP commands
Use the following commands to configure VRRP. For more information about these commands,
see
Avaya G250 and Avaya G350 CLI Reference , 03-300437.
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Use the
ip vrrp
command to create a virtual router on an interface. Use the
no
form of
this command to delete a virtual router.
●
Use the
ip vrrp address
command to assign an IP address to a virtual router. Use the
no
form of this command to remove an IP address from a virtual router.
●
Use the
ip vrrp auth-key
command to set the virtual router simple password
authentication key for the virtual router ID. Use the
no
form of this command to disable
simple password authentication for the virtual router instance.
●
Use the
ip vrrp override addr owner
command to accept packets addressed to
the IP addresses associated with the virtual router, such as ICMP, SNMP, and telnet (if it is
not the IP address owner). Use the
no
form of this command to discard these packets.