Interface Configuration
7750 SR OS Interface Configuration Guide Page 383
The no form of this command restores the default.
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 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.
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 encapsulation are processed; others are silently discarded.
ppp-auto — 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 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
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