Commits on Jun 14, 2023

1. Re-add 127.0.0.1/8 when bringing down the interfaces (sonic-net#15080) …

   * Re-add 127.0.0.1/8 when bringing down the interfaces
   
   With sonic-net#5353, 127.0.0.1/16 was added to the lo interface, and then
   127.0.0.1/8 was removed. However, when bringing down the lo interface,
   like during a config reload, 127.0.0.1/16 gets removed, but 127.0.0.1/8
   isn't added back to the interface. This means that there's a period of
   time where 127.0.0.1 is not available at all, and services that need to
   connect to 127.0.01 (such as for redis DB) will fail.
   
   To fix this, when going down, add 127.0.0.1/8. Add this address before
   the existing configuration gets removed, so that 127.0.0.1 is available
   at all times.
   
   Note that running `ifdown lo` doesn't actually bring down the loopback
   interface; the interface always stays "physically" up.
   
   Signed-off-by: Saikrishna Arcot <[email protected]>

   

   saiarcot895 committed Jun 14, 2023
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