Cisco CX-FEIP-1TX= Installation and con?guration User's Guide download pdf (Page 85)

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PTP 800 Series User Guide Ethernet bridging

phn-2513_004v000 (Oct 2012)

1-45

In-band management

In the in-band management mode, the management agent can be reached from the data

port at the local CMU, and (assuming that the wireless link is established) the data port at

the remote CMU. In this mode, the management port is disabled.

Management frames in the customer network are processed by the management agent if

(a) destination MAC address in the frame matches the CMU MAC address, and (b) the

VLAN ID in the frame matches the VLAN configuration of the management agent.

If Local Packet Filtering is enabled, unicast frames forwarded to the management agent

are filtered, that is, not forwarded in the customer network.

In-band quality of service

The CMU may be configured to tag the Ethernet frames generated by its management

agent. When configured for In Band Management, these frames are assigned to a queue

based on the priority code point in the same way as customer traffic.

Source address learning

If Local Packet Filtering is enabled, the management agent learns the location of end

stations from the source addresses in received management frames. The agent filters

transmitted management frames to ensure that the frame is transmitted at the Ethernet

(data or management) port, or over the wireless link as appropriate. If the end station

address is unknown, then management traffic is transmitted at the Ethernet port and over

the wireless link.

In out-of-band local management mode, management frames are not transmitted over the

wireless link, and so address learning is not active.

Wireless link down alert

The PTP 800 Series can be configured to alert a ‘loss of link’ to the connected network

equipment. It does this by means of a brief disconnection of the copper data port or fiber

data port. When the PTP 800 Series is configured for out-of-band operation, it also briefly

disconnects the management port. Ethernet disconnection typically occurs within 50 ms of

detection of link failure. The alert is triggered by any condition which prevents the link

from forwarding traffic in one or both link directions. Examples include a deep wireless

fade, equipment failure such as an RFU failure, and Ethernet cable disconnection. In 1+1

Hot Standby links, the alert will only be triggered if a protection switch does not resolve

the failure condition, for example if both sets of equipment at an end exhibit a fault or if

there is a deep wireless fade.

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