Alcatel-Lucent 7750 Configuration Manual page 464

Interfaces
Default bcp-null
Parameters atm — Specifies that the encapsulation on the port is ATM.
bcp-null — Only a single service is configured on this channel and IEEE 802.1Q tags are not used as a ser-
vice 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.
Note that null ports will accept q-tagged frames.
bcp-dot1q — 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 encap-
sulation are processed; others are silently discarded.
ppp-auto — Enables PPP on the associated port/channel. The activation of ipcp and mplscp is automati-
cally 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 man-
agement protocol would run.
cisco-hdlc — Monitors line status on a serial interface by exchanging keepalive request messages with peer
network devices.
ppp
Syntax ppp
Context config>port>sonet-sdh>path
Description
This command enables access to the context to configure the LCP operational parameters for a SONET/
SDH Point-to-Point Protocol (PPP) link.
keepalive
Syntax keepalive time-interval [dropcount count]
no keepalive
Context config>port>sonet-sdh>path>ppp
Description This command enables the sending of keepalive messages and configures the time between messages and
how many reports can be missed before bringing the link down.
Page 464 7750 SR Interface Configuration Guide