Configuring Cryptographic Resynchronization (Crypto Resync)
You can use the CTP chassis with cryptographic devices. You can configure synchronized
(in-sync) and pulse cryptographic resynchronized (resync) options for use with these
devices.
If an error occurs on a secure link, the cryptographic devices can get out of sync. When
the CTP software detects that a cryptographic device is out of sync or that keepalives
or LMI has been lost, it signals to the cryptographic device to resync by pulsing DSR and/or
CTS.
The NRZ port has a configuration parameter for cryptographic resynchronization where
you need to specify a port that is on the same node and is monitored. The port has to be
a Fractional T1/E1 port that has Frame transport Enabled. When the bundle that includes
these ports is up and running, the cryptographic resynchronization function monitors the
frame synchronization bit of the framer in the east bound direction, and if the framer
indicates loss of frame, then the cryptographic function is activated.
You can configure how long the CTP software waits before requesting a resynchronization,
set the pulse width, and set the pulse period of the resynchronization request. You can
also configure the direction of the pulse (0 to 1 or 1 to 0). To disable the pulse, set the
in-sync and pulse value to the same value.
To configure cryptographic resynchronization:
1. From the CTP Main Menu, select 1) Bundle Operations >
2. Select 1) CTP.
3. Select a bundle from the list.
4. Select 3) Port Config > 4) Advanced Options > 11) Remote Port T1E1 crypto
This option allows this port to output a crypto resync
pulse based on the T1/E1 frame status (i/f bound) of another port.
The port must be a T1/E1 port or Serial port with T1E1 DCARD.
The port must be configured for fractional T1/E1 w/ frame transport
The port must be on this node.
Would you like to enable this feature? y[n]:
Enter T1/E1 Port [se-0/0]:
5. Enter y and select a T1E1 port when prompted..
6. 12) Crypto Options
0) Back to Previous Menu
1) Crypto resync wait time: 4 sec
2) Crypto resync pulse width: 1 sec
3) Crypto resync pulse period: 8 sec
4) Crypto resync DSR in-sync value: 1 (mark/high/off)
Copyright © 2018, Juniper Networks, Inc.102
Using Bundles to Create Logical Configurations for Physical Interfaces, CTP Release 7.3, CTPView Release 7.3
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