Quick Setup Wizard - Cisco ASR 5000 Series Administration Manual

Configuring MIO/UMIO/MIO2 Port Redundancy
However, if the chassis key is reset in Release 15 through the Quick Setup Wizard or CLI command, a new
chassis ID will be generated in Release 15 format (44 instead of 16 characters). Release14 builds will not
recognize the 44-character chassis ID. If the chassis is subsequently downgraded to Release 14, a new
16-character chassis ID will be generated. To accommodate the old key format, you must save the configuration
file in pre-v12.2 format before the downgrade. If you attempt to load a v15 configuration file on the downgraded
chassis, StarOS will not be able to decrypt the password/secrets stored in the configuration file.
For release 19.2 and higher, in a chassis where the chassis ID file already exists nothing is changed. However,
if the chassis ID file is lost in both management cards, all existing configuration files become invalid. Entering
a new chassis key that is the same as the original value will not resolve the issue because of the new method
used to generate the chassis ID.
After setting a new chassis key, you must save the configuration before initiating a reload. See the Verifying
Caution
and Saving Your Configuration chapter.

Quick Setup Wizard

The Quick Setup Wizard prompts the user to enter a chassis key value. If a chassis key value is not entered a
default chassis is generated using the chassis' MAC address (releases prior to 20.0).
For releases 20.0 and higher, if the chassis ID file does not exist, the Quick Setup Wizard prompts the user
to enter a chassis key. A default chassis ID is not generated if a chassis key is not entered.
To run the Quick Setup Wizard, execute the Exec mode setup command.
[local]
1. Do you wish to continue with the Quick Setup Wizard[yes/no]:
2. Enable basic configuration[yes/no]:
3. Change chassis key value[yes/no]:
4. New chassis key value:
Configuring MIO/UMIO/MIO2 Port Redundancy
Port redundancy for MIO cards provides an added level of redundancy that minimizes the impact of network
failures that occur external to the system. Examples include switch or router port failures, disconnected or cut
cables, or other external faults that cause a link down error.
To ensure that system card and port-level redundancy mechanisms function properly, disable the Spanning
Caution
Tree protocol on devices connected directly to any system port. Failure to turn off the Spanning Tree
protocol may result in failures in the redundancy mechanisms or service outage.
By default, the system provides port-level redundancy when a failure occurs, or you issue the port switch to
command. In this mode, the ports on active and standby MIO/UMIO/MIO2 cards have the same MAC address,
but since only one of these ports may be active at any one time there are no conflicts. This eliminates the need
to transfer MAC addresses and send gratuitous ARPs in port failover situations. Instead, for Ethernet ports,
three Ethernet broadcast packets containing the source MAC address are sent so that the external network
equipment (switch, bridge, or other device) can re-learn the information after the topology change. However,
if card removal is detected, the system sends out gratuitous ARPs to the network because of the MAC address
change that occurred on the specific port.
ASR 5500 System Administration Guide, StarOS Release 21.4
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host_name setup
#
key_string
y
y
System Settings
y