Avaya Configuring Interface and Router Redundancy Instrukcja Użytkownika Strona 26

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Configuring Interface and Router Redundancy
1-4 114079 Rev. B
Only if the routing/bridging tables are on another slot from the new active
interface is there any loss in performance. The priority rules for interfaces to
become active operate to avoid this situation whenever possible.
Warm Standby
When the active interface fails and the circuit has gone down, the CPU module
processing the routing/bridging table is at fault, and the router loses the
routing/bridging tables.
Transmission continues, but is slower than hot standby, because the new active
interface must relearn the routing/bridging tables.
Active Interface MAC Address
When you configure interface redundancy, the active interface uses the following
MAC address in hexadecimal radix:
0x 2
y yy
A2
xx xxxx
0x2 indicates that the address is locally administered by Bay Networks.
y yy indicates the circuit number.
A2 identifies the Bay Networks organizationally unique identifier (OUI).
xx xxxx is the unique router identification number.
The active interface in an interface redundancy group uses the MAC address for
all traffic, including Breath of Life (BOFL). The MAC address switches among
interfaces in the interface redundancy group so that it always represents the active
interface.
The MAC address affects the setup of network-layer protocol adjacent hosts on
adjacent routers. For example, if you have adjacent routers and the IP adjacent
host is defined with its next hop being the active interface in an interface
redundancy group, the adjacent host MAC address must be the active interface’s
MAC address; that is, 0x 2
y yy
A2
xx xxxx
.
The circuit number maps to a virtual LAN (VLAN) on the router. Multiple
VLANs on the same router can be connected to frame switches.
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