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ospf configuration fails to be applied to running-config from tftp or start-up-config

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Information

 
Titleospf configuration fails to be applied to running-config from tftp or start-up-config
Symptoms
When the running config is being copied from the FTP server, we are receiving some NULL message for OSPF configuration after configuring one OSPF command for 40G interfaces during config-file operation.

The same issue exists, if we try to FTP to running config.

When copying it to running configuration, the following configuration is always lost:

ip ospf md5-authentication key-id 8 key 2
$OShyOF9TZ11VOVNhIW8/Ng==

ip ospf network point-to-point

We triedanother solution, which was to copy the configuration to startup-configuration and then reload the device, the following configuration still got lost:

ip ospf md5-authentication key-id 8 key 2
$OShyOF9TZ11VOVNhIW8/Ng==

ip ospf network point-to-point

Environment
Software Release: N/A
Fixed in Version: 4.2
Cause

This issue appears to just be on the 6740s. This problem doesn't affect 6730 switches.

We are able to replicate the issue by doing the following:

1. Telnet to switch.

2. copy running-config ftp://ss:tmp@10.10.3.18/vdx_240.txt

3. Remove OSFP parameters

a. conf t, int fo 1/0/49-52

no ip ospf area
no ip ospf md5-authentication key-id
no ip address

4. copy ftp://ss:tmp@10.10.3.18/file-with-ospf-commands.txt running-config

5. Show running-config will have the OSPF parameters missing.

Resolution

This issue has been root caused.

We are receiving some NULL message for OSPF configuration after configuring one OSPF command for 40G interfaces during config-file operation.

Hence, we are able to see only first line of OSPF configuration is reflecting in switch.

interface FortyGigabitEthernet 1/0/52
description TO-CORE_D_NAME-CORE_B_PORT_4
no fabric isl enable
no fabric trunk enable
ip ospf area 10.207.0.3 ->We could see this config alone is reflecting after file replay.
ip ospf md5-authentication key-id 8 key 2 $OShyOF9TZ11VOVNhIW8/Ng==
ip ospf network point-to-point
ip address 10.4.4.4/24
no shutdown
!

Additional notes

As a workaround, we can use NOSCLI to apply the OSPF related config for 40G interfaces.

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