Initial Configuration Guidelines
  • 30 May 2023
  • 3 Minutes to read
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Initial Configuration Guidelines

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Article Summary

The following procedures must be performed from the console port.

IP Management for Out-of-Band Management

DHCP Client Configuration Procedure

The following command configures the OOB management interface to dynamically acquire the IP address from the DHCP server:

Your Product# configure terminal
Your Product(config)# interface cpu0
Your Product(config-if)# ip address dhcp
Your Product(config-if)# end
Your Product#
  • The following command verifies the OOB management interface dynamic address allocation:
Your Product# show ip interface
cpu0 is up, line protocol is up
Internet Address is 0.0.0.0/0
Broadcast Address 255.255.255.255
IP address allocation method is dynamic
IP address allocation protocol is dhcp
Your Product# show ip interface
cpu0 is up, line protocol is up
Internet Address is <flex-ip-address>
Broadcast Address 16.255.255.255
IP address allocation method is dynamic
IP address allocation protocol is dhcp
Your Product#
  • The following command verifies the routing table:
Your Product# show ip route
Codes: C - connected, S - static, R - rip, B - bgp, O - ospf, I - isis, E - ECMP
IA - OSPF inter area, N1 - OSPF NSSA external type 1,
N2 - OSPF NSSA external type 2, E1 - OSPF external type 1,
E2 - OSPF external type 2 L1 - ISIS Level1, L2 - ISIS Level2, ia - ISIS Inter Area
Vrf Name:          default
---------
  0.0.0.0/0  [0/1] via 16.0.0.254
C 16.0.0.0/8  is directly connected, cpu0

Your Product#
  • The following command verifies the DHCP client statistics for the OOB management interface:
Your Product# show ip dhcp client stats
Dhcp Client Statistics
--------------------------

Interface                     : cpu0
Client IP Address             : 16.0.0.10
Client Lease Time             : 600
Client Remain Lease Time      : 584
Message Statistics
------------------
DHCP DISCOVER                 : 1
DHCP REQUEST                  : 2
DHCP DECLINE                  : 0
DHCP RELEASE                  : 0
DHCP INFORM                   : 0
DHCP OFFER                    : 1

DHCP ACKS IN REQ              : 1
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DHCP NACKS IN REQ             : 0
DHCP ACKS IN RENEW            : 1
DHCP NACKS IN RENEW           : 0
DHCP ACKS IN REBIND           : 0
DHCP NACKS IN REBIND          : 0
DHCP ACKS IN REBOOT           : 0
DHCP NACKS IN REBOOT          : 0
DHCP COUNT ERROR IN HEADER    : 0
DHCP COUNT ERROR IN XID       : 0
DHCP COUNT ERROR IN OPTIONS   : 0
Your Product#


CAUTION: The management connectivity will be lost if the following commands are executed:
#release dhcp cpu0
#renew dhcp cpu0

  • The following commands enable an OOB interface:
Your Product# configure terminal
Your Product(config)# interface cpu0
Your Product(config-if)# no shutdown
Your Product(config-if)# end
Your Product#
  • MIB Configuration Save and Restore
  • The following command writes the running-config to a startup-configuration file:
Your Product# write startup-config
  • The following command restarts the switch:
Your Product# reload


Note: Once the IP address is acquired via DHCP and after reboot, the same IP address is incorrectly restored as a static IP address; default gateway is also restored. The management connectivity remains unaffected.

  • The no form of the commands reset the interface IP address to its default value:
Your Product# configure terminal 
Your Product(config)# interface cpu0
Your Product(config-if)# no ip address
Your Product(config-if)# end
Your Product#
  • The following commands set the static IP address to the OOB interface:
Your Product# configure terminal
Your Product(config)# interface cpu0
Your Product(config-if)# ip address <flex-ip-address>
Your Product(config-if)# end


Note: If the system is left idle after obtaining the IP address for time equal to ARP refresh timer value (300 seconds), the default route entry is removed. If there is continuous management traffic, this issue does not occur.

Bridge Mode Configuration Procedure

This step is required for changing the bridge mode from customer bridge to Provider Edge Bridge.

To configure Bridge Mode

  1. Shutdown the Spanning Tree on Skylight Flex:
Your Product# configure terminal
Your Product(config)# shutdown spanning-tree
Your Product(config)#end
Your Product#
  1. Disable the ECFM module on Skylight Flex:
Your Product# configure terminal
Your Product(config)#no ethernet cfm start
Your Product(config)#end
Your Product#
  1. Set the bridge mode type to Skylight Flex:
Your Product# configure terminal
Your Product(config)# bridge-mode provider-edge
Your Product(config)#end
Your Product#
  1. Execute the following commands to save the running configurations to the start-up configuration. This step allows you to keep the OOB Management interface settings while changing the Bridge Mode.
Your Product# configure terminal
Your Product(config)# write startup-config
Your Product(config)#end
Your Product#
  1. Reload the Skylight Flex using the following CLI commands:
Your Product# configure terminal
Your Product(config)# reload
Your Product(config)#end
Your Product#
  1. Verify the bridge mode type using the following CLI command.
Your Product# show nvram

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