I am trying to configure nagios check_bgp_neighbors plug-in on Ubuntu and followed README file of check_bgp_neighbors plug-in. I have made following changes:

define command{
    command_name    check_bgp_all
    command_line    $USER1$/check_bgp_neighbors -H $HOSTADDRESS$ -C $USER3$ -n $ARG1$ -n $ARG2$
    } 

to

define command{
        command_name    check_bgp_all
        command_line    /usr/local/nagios/libexec/check_bgp_neighbors.sh -H xx.xx.xx.49 -C snmpName -n xx.xx.xx.50

And

define service{
    use             server-service
    hostgroup_name          svc-bgp1
    service_description     BGP Check 1
    check_command           check_bgp_all!10.0.0.1!172.16.0.2
    }

to

define service{
        use                             generic-service
        hostgroup_name                  svc-bgp1
        service_description             BGP Check 1
        check_command                   check_bgp_all!xx.xx.xx.50
        }

xx.xx.xx.49 is the IP of the host router and xx.xx.xx.50 is the IP of eBGP neighbour.

Status information:

line: neighbor:xx.xx.xx.50:sent:78838:received:9769

Failed: status:6 prefixes:16 sent:0 received:1

Log

[1353997904] SERVICE NOTIFICATION: router1;router1;BGP CHECK 2;CRITICAL;notify-service-by-email;line: neighbor:103.7.248.50:sent:78842:received:9772
[1353997904] SERVICE NOTIFICATION: router1;router1;BGP CHECK 2;CRITICAL;notify-service-by-sms;line: neighbor:103.7.248.50:sent:78842:received:9772

Why does it show critical status????

I am not getting response for this question, if you need additional information please mention it in comment.