What is private VLAN promiscuous?

What is private VLAN promiscuous?

Promiscuous port (P-Port): The switch port connects to a router, firewall or other common gateway device. This port can communicate with anything else connected to the primary or any secondary VLAN. In other words, it is a type of a port that is allowed to send and receive frames from any other port on the VLAN.

What is the main purpose of promiscuous port in private VLANs?

A promiscuous access port can serve only one primary VLAN and multiple secondary VLANs (community and isolated VLANs). With a promiscuous port, you can connect a wide range of devices as access points to a PVLAN.

What is trunk mode in VLAN?

Information About VLAN Trunks. Trunking Overview. A trunk is a point-to-point link between one or more Ethernet switch interfaces and another networking device such as a router or a switch. Ethernet trunks carry the traffic of multiple VLANs over a single link, and you can extend the VLANs across an entire network.

What are three types of port designation specific to private VLANs?

The types of domains and ports are:

  • Primary VLAN—The primary VLAN of the PVLAN is defined with an 802.1Q tag (VLAN ID) for the complete PVLAN.
  • Isolated VLAN/isolated port—A primary VLAN can contain only one isolated VLAN.
  • Community VLAN/community port—You can configure multiple community VLANs within a single PVLAN.

Are VLANs still used?

While VLANs are commonly used in modern Ethernet networks, they are not used in the manner first envisioned here. In 1998, Ethernet VLANs were described in the first edition of the IEEE 802.1Q-1998 standard. This was extended with IEEE 802.1ad to allow nested VLAN tags in service of provider bridging.

What is the purpose of private VLAN?

Private VLANs block all traffic to isolated ports except traffic from promiscuous ports. Traffic received from an isolated port is forwarded only to promiscuous ports. You can have more than one isolated port in a specified isolated VLAN. Each port is completely isolated from all other ports in the isolated VLAN.

When to use private VLAN Promiscuous host port?

Private VLAN Promiscuous Trunks are used in situations where a Private VLAN promiscuous host port is normally used but where it is necessary to carry multiple vlans, either normal vlans or for multiple Private VLAN domains. This makes it useful for connecting an upstream router that does not support Private VLANs.

What are the three types of private VLANs?

Following are the three types of Private VLAN (PVLAN) ports. • Promiscuous Port: A promiscuous port can communicate with all interfaces inside the Private VLAN (PVLAN), including the isolated and community ports. • Isolated Port: An Isolated port cannot communicate with other ports within the same PVLAN, except the promiscuous ports.

Can a private VLAN communicate with a community VLAN?

Ports in an isolated VLAN cannot communicate with any device in the VLAN other than the promiscuous port. Ports configured in a community VLAN can communicate with other ports in the same community and the promiscuous port. Ports in different communities cannot communicate with one another. To configure private VLANs, use the following steps.

Are there private VLANs on trunks and SVIS?

If there would be a transit switch between S1 and S2, just acting as an intermediate switch and not connecting any routers or hosts, would it work if only VLANs 100-103 were allowed on the trunks with no PVLAN configuration at all? Thanks for this, it really helped me a lot in understanding PVLAN using promiscuous access ports and SVI’s.