Netgear XCM8806 Chassis User Manual - Page 944

V (Continued) VLAN VLSM VPN VoIP VR-Control VR-Default VRID VR-Mgmt NETGEAR 8800 User Manual Virtual LAN. The term VLAN is used to refer to a collection of devices that communicate as if they are on the same physical LAN. Any set of ports (including all ports on the switch) is considered a VLAN. LAN segments are not restricted by the hardware that physically connects them. The segments are defined by flexible user groups you create with the CLI. Variable-length subnet masks. In OSPF, VLSMs provide subnets of different sizes within a single IP block. Virtual private network. A VPN is a private network that uses the public network (Internet) to connect remote sites and users. The VPN uses virtual connections routed through the Internet from a private network to remote sites or users. There are different kinds of VPNs, which all serve this purpose. VPNs also enhance security. Voice over Internet Protocol is an Internet telephony technique. With VoIP, a voice transmission is cut into multiple packets, takes the most efficient path along the Internet, and is reassembled when it reaches the destination. This virtual router is part of the embedded system in NETGEAR BlackDiamond 10K switches. The VR-Control is used for internal communications between all the modules and subsystems in the switch. It has no ports, and you cannot assign any ports to it. It also cannot be associated with VLANs or routing protocols. (Referred to as VR-1 in earlier XCM8800 software versions.) This virtual router is part of the embedded system in NETGEAR BlackDiamond 10K switches. The VR-Default is the default virtual router on the system. All data ports in the switch are assigned to this virtual router by default; you can add and delete ports from this virtual router. Likewise, this virtual router contains the default VLAN. Although you cannot delete the default VLAN from this virtual router, you can add and delete any user-created VLANs. One instance of each routing protocol is spawned for this virtual router, and they cannot be deleted. (Referred to as VR-2 in earlier XCM8800 software versions.) In VRRP, the VRID identifies the VRRP virtual router. Each VRRP virtual router is given a unique VRID. All the VRRP routers that participate in the VRRP virtual router are assigned the same VRID. This virtual router is part of the embedded system in NETGEAR BlackDiamond 10K switches. The VR-Mgmt enables remote management stations to access the switch through Telnet, SSH, or SNMP sessions; and it owns the management port. The management port cannot be deleted from this virtual router, and no other ports can be added. The Mgmt VLAN is created is in this virtual router, and it cannot be deleted; you cannot add or delete any other VLANs or any routing protocols to this virtual router. (Referred to as VR-0 in earlier XCM8800 software versions.) 944 | Appendix E. Glossary