[no] channel-group channel-group-id
config>port>serial>rs232>channel-group
config>port>serial>rs530>channel-group
config>port>serial>v35>channel-group
config>port>serial>x21>channel-group
This command creates a DS0 channel group on a channelized RS-232, RS-530, V.35, or X.21 circuit.
RS-530 channel groups are only supported on the 12-port Serial Data Interface card, version 3.
When a socket is configured using the socket command, the RS-232 channel-group command is blocked.
Channel groups cannot be further subdivided.
The no form of this command deletes the specified channel group.
n/a
specifies the channel group ID number
crc {16 | 32}
config>port>serial>rs232>channel-group
config>port>serial>v35>channel-group
config>port>serial>x21>channel-group
This command configures the precision of the cyclic redundancy check. The command is valid only if the encap-type is frame-relay or ipcp.
16
a 16-bit checksum is used for the channel group
a 32-bit checksum is used for the channel group
encap-type {cem | ipcp | frame-relay | hdlc | cisco-hdlc}
no encap-type
config>port>serial>rs232>channel-group
config>port>serial>rs530>channel-group
config>port>serial>v35>channel-group
config>port>serial>x21>channel-group
This command configures the encapsulation method used for the channel group.
When encap-type is specified, the channel group must be deleted before encap-type can be changed.
The frame-relay, ipcp, hdlc, and cisco-hdlc encapsulation types are not supported on RS-232 or RS-530 interfaces or on ports with subrate speeds (below 64 kb/s). For RS-232 and RS-530 interfaces, only cem is supported.
The no form of this command restores the default value.
no encap-type
specifies the encapsulation type as circuit emulation mode
specifies the encapsulation type as frame relay mode
specifies the encapsulation type as ipcp mode for a PPP channel group in access mode
specifies the encapsulation type as hdlc mode
specifies the encapsulation type as cisco-hdlc mode
idle-cycle-flag {flags | ones}
no idle-cycle-flag
config>port>serial>v35>channel-group
config>port>serial>x21>channel-group
This command defines the value to be transmitted by the channel group during its idle cycle. The command is valid only if the encap-type is frame-relay or ipcp.
flags
defines the 8-bit value to be transmitted as 01111110
defines the 8-bit value to be transmitted as 11111111
idle-payload-fill {all-ones | pattern}
no idle-payload-fill
config>port>serial>rs232>channel-group
config>port>serial>rs530>channel-group
config>port>serial>v35>channel-group
config>port>serial>x21>channel-group
This command defines the data pattern to be transmitted when the circuit emulation service is not operational or temporarily experiences underrun conditions.
This command is valid only if encap-type is cem.
The no form of this command restores the default value.
all-ones
defines the 8-bit value to be transmitted as 11111111
defines the 8-bit value to be transmitted as accepted in decimal, hex or binary format, from 0 to 255
mode {access | network}
config>port>serial>rs232>channel-group
config>port>serial>rs530>channel-group
config>port>serial>v35>channel-group
config>port>serial>x21>channel-group
This command configures a channel group for access mode or network operation. Only access mode is supported on serial channels; if the user selects the network option, the CLI returns an error message.
An access port or channel is used for customer-facing traffic on which services are configured. SAPs can only be configured on an access port or channel. When a serial port is configured for access mode, multiple services can be configured on the port.
access
configures the serial channel as service access
configures the serial channel for transport network use
mtu {mtu-bytes}
no mtu
config>port>serial>v35>channel-group
config>port>serial>x21>channel-group
This command defines the maximum MTU size that the channel group can support. The command is valid only if the encap-type is frame-relay or ipcp.
1514 for frame relay
1502 for ipcp
578 to 2090
[no] ppp
config>port>serial>v35>channel-group
config>port>serial>x21>channel-group
This command enables access to the context to configure the LCP operational parameters for a V.35 or X.21 channel group. This command is available only if the encap-type is set to ipcp and therefore does not apply to RS-232 ports or to X.21 ports configured for subrate speeds.
The no form of the command removes the LCP operational parameters.
no ppp
keepalive time-interval [dropcount drop-count]
no keepalive
config>port>serial>v35>channel-group>ppp
config>port>serial>x21>channel-group>ppp
This command enables the sending of keepalive messages and configures the time between messages and how many messages can be missed before the link is brought down. The no form of this command disables the sending of keepalive messages.
keepalive 10 dropcount 3
the time, in seconds, between keepalive messages
the number of consecutive failed keepalive request attempts or remote replies that can be missed before the link is operationally brought down