How to upload Cisco log file, output from Rsyslog too Kibana

Hello,

I am using a Ubuntu VM to host the entire ELK stack, I am using Rsyslog to listen for Cisco IOS logs and have successfully managed to output these logs to a file. I am trying to upload the file too Kibana but it cant parse the date in the logs and gives me the error messages shown below:

0: java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: unable to parse date [Mar 12 06:26:02]

{"message":"Mar 12 06:26:02 10.0.0.11 49: *Mar 1 23:33:36.139: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to down"}

1: java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: unable to parse date [Mar 12 06:26:05]

*{"message":"Mar 12 06:26:05 10.0.0.11 50: Mar 1 23:33:38.756: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to up"}

2: java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: unable to parse date [Mar 12 06:26:07]

*{"message":"Mar 12 06:26:07 10.0.0.11 51: Mar 1 23:33:40.786: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up"}

Kibana seems to be understand the date format, as shown below:

MMM dd HH:mm:ss.SSS, MMM d HH:mm:ss.SSS

below is the grok pattern kibana displays when i upload the file:

{SYSLOGTIMESTAMP:timestamp} %{IP:ipaddress} %{INT:field}: .*?%{SYSLOGTIMESTAMP:extra_timestamp}: %.

My questions are, is the method I am using of outputting to a file and uploading to Kibana, possible? and how can i change the format of the log file so that Kibana understands the logs?

Thanks in advanced, I look forward to the replies.