C
HAPTER
20
| Unicast Routing
Configuring the Routing Information Protocol
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password. If any incoming protocol messages do not contain the correct
password, they are simply dropped.
For authentication to function properly, both the sending and receiving
interface must be configured with the same password or authentication
key.
Loopback Prevention
Just as Layer 2 switches use the Spanning Tree Algorithm to prevent loops,
routers also use methods for preventing loops that would cause endless
retransmission of data traffic. When protocol packets are caught in a loop,
links will be congested, and protocol packets may be lost. However, the
network will slowly converge to the new state. RIP supports several
methods which can provide faster convergence when the network topology
changes and prevent most loops from occurring.
PARAMETERS
These parameters are displayed in the web interface:
◆ VLAN ID – Layer 3 VLAN interface. This interface must be configured
with an IP address and have an active link. (Range: 1-4093)
◆ Send Version – The RIP version to send on an interface.
â–
RIPv1: Sends only RIPv1 packets.
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RIPv2: Sends only RIPv2 packets.
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RIPv1 Compatible: Route information is broadcast to other
routers with RIPv2.
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Do Not Send: Does not transmit RIP updates. Passively monitors
route information advertised by other routers attached to the
network.
The default depends on the setting for the Global RIP Version. (See
"Configuring General Protocol Settings" on page 485.)
◆ Receive Version – The RIP version to receive on an interface.
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RIPv1: Accepts only RIPv1 packets.
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RIPv2: Accepts only RIPv2 packets.
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RIPv1 or RIPv2: Accepts RIPv1 or RIPv2 packets.
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Do Not Receive: Does not accept incoming RIP packets. This
option does not add any dynamic entries to the routing table for an
interface.
The default depends on the setting for the Global RIP Version. (See
"Configuring General Protocol Settings" on page 485.)
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