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What’s CE?
CE is customer edge, it’s the network device located at customer site.
It should have at least 1 connection towards provider edge device.
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What’s PE?
PE is provider edge, it’s the interfaces between clients and service provider network.
It should have at least 1 interface outside the provider network.
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What’s P?
P is provider core device, it’s the router or network device that has all interfaces inside the service provider network.
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What’s UNI?
UNI is user to network interface.
It’s the demarcation points between subscriber and service provider, it can be the connection between CE and PE.
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What’s NNI
NNI is network to network interface.
It’s the connection between 2 service providers.
It’s should be between 2 PE devices.
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What’s the ELINE
It’s the point to point Ethernet service.
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What’s ELAN?
It’s the multipoint to multipoint Ethernet service.
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What’s E- Tree?
It’s Ethernet point to multi point services where the root node can communicate with all leafs, but leafs can’t communicate with each other.
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What’s the Pesudo wire?
It’s a virtual connecycan be created to transport any kind of legacy technology traffic like TDM in to packet networks.
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What’s the trail?
It’s a logical transmission line created virtually be software configuration to transport the traffic inside optical system.
Trail can be ODU, OTU, OMS, OTS, client.
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