Interface Configuration
7750 SR OS Interface Configuration Guide Page 407
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 protocol 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.
ipcp — Ingress frames are encapsulated according to the IP Control Protocol. When ipcp
encapsulation is specified, the PPP IP Control Protocol will be activated and only packets that
comply with IPCP encapsulation are processed; others are silently discarded.
ppp-auto — (Network mode) Enables PPP on the associated port/channel. The activation of ipcp
and mplscp is automatically enabled depending on the protocol configuration. This encap type is
only valid on ports/channels in network mode.
frame-relay — Enables frame relay on the associated port/channel.
wan-mirror — The port is used for mirroring of frame-relay and POS ports. On these ports, no link
management protocol will run.
cisco-hdlc — Monitors line status on a serial interface by exchanging keepalive request messages
with peer network devices.
cem — On circuit emulation CMAs and MDAs, only the cem encap-type is supported. All other
values are blocked with an appropriate warning. The cem encap-type is not supported on other
CMAs and MDAs and are blocked with an appropriate warning.
feac-loop-respond
Syntax [no] feac-loop-respond
Context config>port>tdm>ds3
config>port>tdm>e3
Description This command enables the associated DS-3 interface to respond to remote loop signals.
The DS-3 far-end alarm and control (FEAC) signal is used to send alarm or status information from
the far-end terminal back to the local terminal. DS-3 loopbacks at the far-end terminal from the local
terminal are initiated.
The no form of this command prevents the associated DS-3/E-3 interface from responding to remote
loop signals.
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