Alcatel-Lucent 7750 Configuration Manual page 488

Interfaces
encap-type
Syntax encap-type {atm | bcp-null | bcp-dot1q | ipcp | ppp-auto | frame-relay | wan-mirror |cisco-
hdlc}
Context config>port>tdm>ds1>channel-group
config>port>tdm>ds3
config>port>tdm>e1>channel-group
config>port>tdm>e3
Context This command configures the encapsulation method used to on the specified port, path, or channel. This
parameter can be set on both access and network ports.
When the encap-type is set to ATM the CRC, timeslots, scrambling (if applicable), and idle-cycle-flags are
set to ATM defaults respectively. When the encap-type is changed from ATM, those parameters are set to
their non-ATM defaults.
When the encap-type is ATM, ATM sub-layer verification (GR-1248-CORE, Generic Requirements for
Operations of ATM Network Elements (NEs)) is automatically enabled. When ATM PLCP cell mapping is
used, the results of this verification include:
•
•
•
When ATM direct cell mapping is used, the result of the verification includes:
•
•
The no form of this command restores the default.
Default bcp-null
Parameters
atm — Specifies the encapsulation on the port is ATM.
bcp-null — When selected, this keyword specifies that only a single service is configured on this channel
and IEEE 802.1Q tags are not used as a service delimiter. Any IEEE 802.1Q tags encountered are
regarded as part of the customer payload and transparently forwarded. When bcp-null encapsulation is
specified, the PPP Bridge Control Protocol (BCP) is activated and all packets on this access port will be
encapsulated in accordance with the BCP protocol.
bcp-dot1q — When selected, this keyword specifies that ingress frames carry IEEE 802.1Q tags and the
tags are used as service delimiter. Any untagged packets are silently discarded with exception of proto-
col specific packets. When bcp-dot1q encapsulation is specified, the PPP Bridge Control Protocol
(BCP) is activated and all packets on this access port will be encapsulated in accordance with the BCP
protocol.
Page 488
PLCP Severely Errored Framing Seconds
PLCP Alarm State
PLCP Unavailable Seconds Counter
Out of Cell Delineation (OCD) event count. The OCD event count is described in RFC 2515,
Definitions of Managed Objects for ATM Management. Note that multiple events occurring within
a second will be counted as 1 event for ASAP MDAs as a result of a hardware limit.
Loss of Cell Delineation defect/alarm. The LCD defect/alarm is defined in RFC 2515, Definitions
of Managed Objects for ATM Management. When a path is in an LCD defect state, the path's
operational status will be down. When a path exits the LCD state, the path's operational status will
change to up (assuming nothing else causes the path to stay down). A trap is raised to indicate the
LCD status change. Also, a P-RDI is sent to indicate the defect to the remote end.
7750 SR Interface Configuration Guide