Harish,

On 22 August 2017 at 09:24, Harish Shetty <harish23shetty@gmail.com> wrote:

I am using bird-1.4.5-1.el6,

That release is more than 3 years old at this point, bird-1.6.3 was released 2016-12-22 and is probably your best bet to try that first and see if the problem is fixed.