Cisco Cisco Prime Network 4.2 Guia Do Utilizador
Cisco Prime Network 4.2.2 Supported Technologies and Topologies
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6.2.16 Physical Layer Counters
The physical layer is used for topology verification (that is, if a link has already been discovered, it is
tested periodically), which is done using counters. Physical layer counters are based on the port traffic
signature, using octet-based or octet- and packet–based traffic.
Using the port traffic signature, it is possible to disqualify a connection between two ports based on
their counters.
tested periodically), which is done using counters. Physical layer counters are based on the port traffic
signature, using octet-based or octet- and packet–based traffic.
Using the port traffic signature, it is possible to disqualify a connection between two ports based on
their counters.
6.2.17 IP Testing
Prime Network uses IP testing (IPv4) to discover the topology for PPP/HDCL and MPLS technologies. In
both cases, the IP test checks the IP configuration on the relevant interface(s) and verifies that there is a
match. In this context, finding a match means that the IP configuration is compared using the primary IP
subnet configured on the local and remote interfaces, and the local IP subnet is equal to or contained in
the remote IP subnet.
both cases, the IP test checks the IP configuration on the relevant interface(s) and verifies that there is a
match. In this context, finding a match means that the IP configuration is compared using the primary IP
subnet configured on the local and remote interfaces, and the local IP subnet is equal to or contained in
the remote IP subnet.
Note that there is an inherent limitation in using only the primary address and mask to define the IP
subnet to be compared. This can cause issues when two interfaces are connected but have more than
one address and, in either or both cases, the primary is from a different subnet. For example: We have
two devices, Device1 and Device2. POS2/1 on Device1 is connected to POS1/1 on Device2. The
configuration of Device1 is:
subnet to be compared. This can cause issues when two interfaces are connected but have more than
one address and, in either or both cases, the primary is from a different subnet. For example: We have
two devices, Device1 and Device2. POS2/1 on Device1 is connected to POS1/1 on Device2. The
configuration of Device1 is:
The configuration of Device is:
In this case, the two devices will not be connected.