
Interface Configuration
7750 SR OS Interface Configuration Guide
Page 281
32 —
Use 32 bit checksum for the associated port/channel.
down-count
Syntax
down-count
down-coun
t
no down-count
Context
config>port>sonet-sdh>path>cisco-hdlc
config>port>tdm>ds1>channel-group>cisco-hdlc
config>port>tdm>ds3>cisco-hdlc
config>port>tdm>e1>channel-group>cisco-hdlc
config>port>tdm>e3>cisco-hdlc
Description
This command configures the number of keepalive intervals that must pass without receiving a
keepalive packet before the link is declared down. It is expected that the nodes at the two endpoints of
the cHDLC link are provisioned with the same values.
Default
3
down-count —
Specifies the number of keep alive intervals that must pass without receiving a keep
alive packet before the link is declared down.
Values
3 — 16
encap-type
Syntax
encap-type
{
atm
|
bcp-null
|
bcp-dot1q
|
ipcp
|
ppp-auto
|
frame-relay
|
wan-mirror
|cisco-hdlc| cem
}
Context
config>port>tdm>ds1>channel-group
config>port>tdm>ds3
config>port>tdm>e1>channel-group
config>port>tdm>e3
Description
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:
• PLCP Severely Errored Framing Seconds
• PLCP Alarm State
• PLCP Unavailable Seconds Counter
When ATM direct cell mapping is used, the result of the verification includes:
Summary of Contents for 7750 SR OS
Page 6: ...Page 6 7750 SR OS Interface Configuration Guide Table of Contents ...
Page 8: ...Page 8 7750 SR OS Interface Configuration Guide List of Tables ...
Page 10: ...Page 10 7750 SR OS Interface Configuration Guide List of Figures ...
Page 14: ...Preface Page 14 7750 SR OS Interface Configuration Guide ...
Page 16: ...Getting Started Page 16 7750 SR OS Interface Configuration Guide ...
Page 184: ...Card MDA and Port Command Reference Page 184 7750 SR OS Interface Configuration Guide ...
Page 438: ...Debug Commands Page 438 7750 SR OS Interface Configuration Guide ...
Page 444: ...Index Page 444 7750 SR OS Interface Configuration ...