What is ATM LLC bridged?
ATM bridging (RFC2684) is mainly use in the scope of xDSL connections. It provides a convenient way to extend ethernet facility over ATM. The RFC 2684 “describes two encapsulations methods for carrying network interconnect traffic over AAL type 5 over ATM”.
What is DSL encapsulation?
It defines two mechanisms for identifying the protocol carried in ATM Adaptation Layer 5 (AAL5) frames. It replaces RFC 1483, a standard data link access protocol supported by DSL modems. In LLC Encapsulation the hosts use a single virtual circuit for multiple protocols.
What is 1483 bridged?
RFC 1483 describes two different methods for carrying connectionless network interconnect traffic over an ATM network: routed protocol data units (PDUs) and bridged PDUs. Routing allows multiplexing of multiple protocols over a single ATM virtual circuit (VC).
What is the difference between PPPoA and PPPoE?
The difference between PPPoE and PPPoA is that PPPoE (Point-to-Point Protocol over Ethernet) expresses the essential features of PPP frames within the Ethernet frames succinctly whereas PPPoA (Point-to-Point Protocol over ATM) expresses the essential features of frames within AAL5 succinctly.
What is multiplexing method VC vs LLC?
Virtual Circuit Multiplexing As its name suggests, VC-MUX can handle more data quicker than LLC. The big difference here is the “agreement” among the systems on any specific network. This means that all systems must agree on the specific nature of the data translation method.
What is the difference between PPP and PPPoE?
PPPoE uses standard methods of encryption, authentication, and compression specified by PPP. PPPoE is configured as a point to point connection between two Ethernet ports. IP is overlaid over a PPP connection and uses PPP as a virtual dial-up connection between points on the network.
Which is better PPPoA or PPPoE?
PPPoA is ever so slightly faster than PPPoE as PPPoA has 8 fewer bytes of overhead in every 1500 byte packet. Most users do not notice the difference which works out to be about one-half of one percent. Using PPPoA does avoid the Maximum Transfer Unit (MTU) issue.
Is VDSL PPPoE or PPPoA?
The VDSL2 modem acts as an ethernet bridge. On the DSL side, it operates in PTM mode and not ATM mode, hence PPPoE rather than PPPoA. The modem encapsulates the ethernet frames from the IP router with a control header for transmission over the twisted pair to the DSLAM in the cabinet.
What is LLC and VC?
The difference between LLC-mux and VC-mux comes about when multiple protocols are deployed over the same ADSL connection. LLC-mux allows protocols to be separated on a single ATM virtual circuit, whilst VC-mux requires one ATM virtual circuit per protocol but has lower overheads.
Is PPP protocol still used?
PPP (Point-to-point protocol) is a WAN protocol that is often used on point-to-point links. Nowadays it’s still used for DSL with PPPoE (PPP over Ethernet) and PPPoA (PPP over ATM). One of the advantages of still using PPP is that it allows authentication through PAP and CHAP.
How does LLC encapsulation work for multiple protocols?
In LLC Encapsulation the hosts use a single virtual circuit for multiple protocols. This has the advantage of allowing all traffic over the same circuit, but the disadvantage of requiring each packet to contain octets that identify the protocol type, which adds overhead.
What kind of encapsulation is needed for ATM?
The RFC 2684 “describes two encapsulations methods for carrying network interconnect traffic over AAL type 5 over ATM”. In clear, this explains how to encapsulate standard network traffic (such as ethernet) in ATM to carry them over long distance.
Which is logical link layer encapsulation type does Junos support?
Configure a logical link-layer encapsulation type. Not all encapsulation types are supported on the switches. See the switch CLI. Starting in Junos OS Release 20.1R1, aggregated ethernet interfaces supports VLAN TCC (Translational cross-connect) encapsulation on MX series platforms.
Are there any Ethernet switches that support encapsulation?
Not all encapsulation types are supported on the switches. See the switch CLI. Starting in Junos OS Release 20.1R1, aggregated ethernet interfaces supports VLAN TCC (Translational cross-connect) encapsulation on MX series platforms. See Configuring VLAN TCC Encapsulation for more details.