Cisco ASR 9000 Series Configuration Manual

Configuring Serial Interfaces on the Cisco ASR 9000 Series Router
How to Configure Serial Interfaces
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Cisco ASR 9000 Aggregation Services Router Interfaces and Hardware Component Configuration Guide
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Note Cisco HDLC is enabled by default on serial interfaces.
Prerequisites
Before modifying the keepalive timer configuration, ensure that Cisco HDLC or PPP encapsulation is
enabled on the interface. Use the encapsulation command to enable Cisco HDLC or PPP encapsulation
on the interface, as described in the “Configuring Optional Serial Interface Parameters” section on
page 518.
Restrictions
Is there a comparable recommendation for ASR9k with keepalives for MDR upgrade? XR12k
recommends disabling keepalives and CRS recommends setting interval to greater than or equal
to 10 sec.
• Before performing a Minimal Disruptive Restart (MDR) upgrade, we recommend disabling
keepalives on a Cisco XR 12000 Series Router.
• Before performing a Minimal Disruptive Restart (MDR) upgrade, we recommend configuring a
keepalive interval of 10 seconds or more on a Cisco CRS-1 Router.
SUMMARY STEPS
1. configure
2. interface serial interface-path-id
3. keepalive {seconds | disable}
or
no keepalive
4. end
or
commit
5. show interfaces type interface-path-id
DETAILED STEPS
Command or Action Purpose
Step 1
configure
Example:
RP/0/0RP0RSP0/CPU0:router# configure
Enters global configuration mode.
Step 2
interface serial interface-path-id
Example:
RP/0/0RP0RSP0/CPU0:router(config)# interface
serial 0/1/0/0
Specifies the serial interface name and notation
rack/slot/module/port and enters interface configuration
mode.

Cisco ASR 9000 Series Specifications

General

Brand	Cisco
Model	ASR 9000 Series
Category	Network Router
Language	English