What is Layer 2 protocol tunneling?
When protocol tunneling is enabled, edge devices on the inbound side of the service-provider network encapsulate Layer 2 protocol packets with a special MAC address and send them across the service-provider network. Core devices in the network do not process these packets but forward them as normal packets.
How do I create a VLAN tunnel?
Creating a 802.1Q Tunnel Port You create the dot1q-tunnel port using the switchport mode command. You must set the 802.1Q tunnel port to an edge port with the spanning-tree port type edge command. The VLAN membership of the port is changed when you enter the switchport access vlan vlan-id command.
Is VLAN a protocol?
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks (VLAN) on the whole local area network. To do this, VTP carries VLAN information to all the switches in a VTP domain.
What is VLAN mapping?
VLAN Mapping provides a mechanism for Service Providers to translate CVLANs to SVLANs when a packet enters its network and vice-versa, when it leaves the network. VLAN translation is enabled on a per-port basis, where a CVLAN is mapped to an SVLAN.
What is the tunneling protocol used?
Tunneling is often used in virtual private networks (VPNs). It can also set up efficient and secure connections between networks, enable the usage of unsupported network protocols, and in some cases allow users to bypass firewalls.
Is IPsec better than SSL?
When it comes to corporate VPNs that provide access to a company network rather than the internet, the general consensus is that IPSec is preferable for site-to-site VPNs, and SSL is better for remote access.
Is IPsec a Layer 2?
Layer 2 IPsec VPN is a logical extension of the Layer 2 broadcast domain across an IPsec VPN tunnel.
Where does layer 2 protocol tunneling take place?
You enable Layer 2 protocol tunneling (by protocol) on the access ports or tunnel ports that are connected to the customer in the edge switches of the service-provider network. Edge-switch tunnel ports are connected to customer 802.1Q trunk ports; edge-switch access ports are connected to customer access ports.
Can a Juniper router use layer 2 Tunneling?
For ELS details, see Using the Enhanced Layer 2 Software CLI. With Layer 2 protocol tunneling (L2PT) enabled, Juniper Networks Ethernet routers and switches can send Layer 2 protocol data units (PDUs) across the network and deliver them to devices that are not part of the local broadcast domain.
Can a port be configured as an 802.1Q tunnel port?
• When a port is configured as an 802.1Q tunnel port, spanning-tree bridge protocol data unit (BPDU) filtering is automatically enabled on the interface. Cisco Discovery Protocol (CDP) is automatically disabled on the interface. To configure a port as an 802.1Q tunnel port, perform this task:
How are packets sent through a tunnel port?
The packet is sent as a normal 802.1Q-tagged frame to preserve the original VLAN numbers in the customer network. All packets entering the Service Provider network through a tunnel port on an edge switch are treated as untagged packets, whether they are untagged or already tagged with 802.1Q headers.