Cisco CX-FEIP-1TX= Installation and con?guration User's Guide download pdf (Page 130)

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Data network planning Chapter 2: Planning considerations

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phn-2513_004v000 (Oct 2012)

Data network planning

When planning PTP 800 data networks, consider the factors described in this section.

Management mode

Decide how the PTP 800 will be managed. There are three modes of management: out-of-

band local, out-of-band and in-band.

In the default out-of-band local management mode, the management agent can be reached

only from the Management port of the CMU. This mode is appropriate during

configuration and installation when the equipment is managed using a locally connected

PC at each end of the link. It may additionally be useful where network management

communication is based on a completely independent data network (for example, one

based on a 3G cellular wireless terminal at each site).

In many network applications the wireless link will provide the only communication path to

a remote site. In such applications, CMUs and other network equipment at the remote site

will be managed over the wireless link. For applications of this type, select either out-of-

band or in-band management mode.

Configure out-of-band management when there is a requirement to fully separate customer

data traffic from the traffic generated by management of the network equipment. When

configured for out-of-band management mode, the PTP 800 supports two networks, the

customer data network and the management network. The customer data is transported

between the Data ports of the CMUs and the management traffic is transported between

the Management ports. The CMU management agent is also part of the management

network. Traffic never crosses between the two networks. The management network has a

configurable Committed Information Rate of between 100 kbps and 2 Mbps. It will also

provide a maximum of 10 Mbps when there is no customer traffic to send over the link.

When configured for in-band management mode, the PTP 800 only supports a single

network. Customer traffic and Management traffic are multiplexed and passed between

the Data ports of the CMUs. The CMU Management port is disabled in this mode. This

mode of operation may be useful where a customer has a limited number of Ethernet ports

at a site.

Make sure that the same management mode is selected for CMUs at both ends of a link.

See Management network on page 1-43 for further explanation of management modes.

When using out-of-band management mode, avoid connecting Management and Data

ports in the same network. Loops in the network can be complicated to detect and

correct.

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