ADTRAN Stub Routing Spécifications télécharger pdf (Page 100)

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A network loopback loops data toward the network (away from the unit). A customer loopback loops data

toward the router. The router does not instigate customer-side loopbacks, only network loopbacks (remote or

local). The reason for this is that the customer interface is internal to the router. There is little use for looping

back router data on itself.

A transparent loopback is one in which the unit loops back one side (i.e., network) and also allows the same

incoming data to be passed through to the customer side. A non-transparent loopback is one which loops back

one side of the interface (network) but sends idle codes to the other side (customer). The AOS defaults to

non-transparent loopbacks. The reason for this is that sending test patterns into the IP stack could cause

unpredictable behavior. However, it is still possible for the network to send a transparent loopback request.

Such requests will be accepted.

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