Alteon OS Application Guide

 

Virtual Router

A shared address between two devices utilizing VRRP, as defined in RFC 2338. One vir-

 

tual router is associated with an IP interface. This is one of the IP interfaces that the switch

 

is assigned. All IP interfaces on the GbE Switch Modules must be in a VLAN. If there is

 

more than one VLAN defined on the Web switch, then the VRRP broadcasts will only be

 

sent out on the VLAN of which the associated IP interface is a member.

VRID (Virtual Router

In VRRP, a value between 1 and 255 that is used by each virtual router to create its MAC

Identifier)

address and identify its peer for which it is sharing this VRRP address. The VRRP MAC

 

address as defined in the RFC is 00-00-5E-00-01-{VRID}. If you have a VRRP address

 

that two switches are sharing, then the VRID number needs to be identical on both

 

switches so each virtual router on each switch knows whom to share with.

VRRP (Virtual Router

A protocol that acts very similarly to Cisco's proprietary HSRP address sharing protocol.

Redundancy Protocol)

The reason for both of these protocols is so devices have a next hop or default gateway that

 

is always available. Two or more devices sharing an IP interface are either advertising or

 

listening for advertisements. These advertisements are sent via a broadcast message to an

 

address such as 224.0.0.18.

 

With VRRP, one switch is considered the master and the other the backup. The master is

 

always advertising via the broadcasts. The backup switch is always listening for the broad-

 

casts. Should the master stop advertising, the backup will take over ownership of the

 

VRRP IP and MAC addresses as defined by the specification. The switch announces this

 

change in ownership to the devices around it by way of a Gratuitous ARP, and advertise-

 

ments. If the backup switch didn't do the Gratuitous ARP the Layer 2 devices attached to

 

the switch would not know that the MAC address had moved in the network. For a more

 

detailed description, refer to RFC 2338.

256 „ Glossary

42C4911, January 2007

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Nortel Networks 42C4911 manual Vrid Virtual Router
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42C4911 specifications

Nortel Networks 42C4911 is a key hardware component designed to meet the needs of modern telecommunications infrastructure. As part of Nortel's extensive portfolio, the 42C4911 has made a significant impact on network design and operation, particularly in enterprises requiring reliable and efficient communication solutions.

One of the standout features of the 42C4911 is its modularity. This allows for flexible configurations and upgrades, enabling organizations to adapt to changing technology requirements and business demands. The design philosophy behind the 42C4911 emphasizes scalability, allowing users to start with a basic setup and expand it as their networking needs grow. This feature is particularly appealing to medium and large enterprises that anticipate increased data and communication requirements over time.

In terms of technology, the 42C4911 supports various telecommunications standards, making it versatile for multiple applications. It typically integrates with other Nortel equipment and can work with third-party devices, ensuring seamless interoperability across different platforms. This is critical as organizations look to create unified communications systems that can handle voice, data, and video traffic efficiently.

The 42C4911 is known for its robust performance and reliability. It is designed to operate continuously under demanding conditions, which is essential for organizations that rely on constant connectivity for their operations. Its built-in redundancy features help safeguard against potential failures, thus enhancing the overall stability of the network. This reliability is further complemented by Nortel's commitment to high-quality manufacturing standards, ensuring that users receive a durable and efficient product.

Security is another major consideration for any networking device, and the 42C4911 provides advanced security features to protect sensitive data. With increasing cybersecurity threats, organizations prioritize devices that offer strong encryption and access control mechanisms. The 42C4911 addresses these needs while facilitating secure communication channels for users, which is essential in today's increasingly interconnected world.

Overall, the Nortel Networks 42C4911 stands out as a versatile and powerful component in the telecommunications landscape. Its modular design, compatibility with diverse technologies, reliability, and emphasis on security make it an appealing choice for organizations looking to enhance their networks. As companies continue to navigate the complexities of communication, devices like the 42C4911 play a crucial role in ensuring that they remain connected and efficient.
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