HTTP download stops and gives "Network Error" during FTD Failover

[SHABEEB KUNHIPOCKER]

Hello,

I was testing the FTD failover (version 7.4.2.1) for one of my customers yesterday. I mainly tested ICMP and HTTP downloads during the failover. 

My test process is as follows

1- Started a continuous ping to 8.8.8.8

2- Downloaded a large file via HTTP

3- Initiate a failover

Results:

1- The ICMP had maximum 4 request timeouts

2- The HTTP download was stuck for some time and then it failed with error "Could not download file. Network Error"

I already have failover replication http (checked in the CLI of FTD) enabled, So my expectation is that the HTTP sessions should not break and the download should start automatically after the failover. I confirmed that the  the connections are synced between the firewalls.

Please advise.

[threadbareshorts]

I'm seeing large file downloads halting at 2GB on FTD3105 on 7.4.2.1, too. No failover correlation, just the files failing to transfer over a stable HA pair. I put these boxes in and don't recall clicking the "kill file transfers above 2GB" button. Anyone have any thoughts?

[bob@bob-n02 ~]$ curl -O http://dl.delivery.mp.microsoft.com/filestreamingservice/files/b4fe2c14-0069-421d-a78d-64f75c2828f0/190
45.3803.231204-0204.22h2_release_svc_refresh_CLIENTBUSINESS_VOL_x64FRE_en-gb.esd
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
 54 3842M   54 2078M    0     0  40.9M      0  0:01:33  0:00:50  0:00:43     0

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