I need some help on configuring SNMP for Juniper EX4500 ethernet switch. I am performing this command:

host1:~# snmpwalk -v 2c -c my_community_string .1
Timeout: No Response from

where - switch's external IP address.

From the host1 I am able to connect to other switch's ports such as 22.

SNMP agent looks to be running:

juniper> show system processes extensive | match snmp 
 2101 root         1  96    0 18860K 14628K select   0:06  0.00% snmpd

Also, I am able to query from the switch:

juniper> show snmp mib get 
ifHCInOctets.524 = 1200002682732106

SNMP configuration:

juniper> show configuration snmp 
location Switch;
community my_community_string {
    clients {;

where - a host I'm connecting from

I would appreciate any help as I just lost in documentation and afraid to break something.

Thank you.

  • Are you sure you are not NATting the connection towards that device ? – Gabor Vincze Mar 12 '13 at 16:43
  • Sorry, my knowledge is very basic in this area. Could you tell me how to check on that? – Andrew Mar 12 '13 at 16:57
  • 1
    I mean, is there an other network device between your snmp client and your Juniper stuff ? If yes, does it make NAT between the two network accidentally ? – Gabor Vincze Mar 12 '13 at 17:21

you're missing the authorization statement... set snmp community my_community_string authorization read-only

  • also, try "system" in your SNMPwalk instead of just .1 – SpacemanSpiff Mar 13 '13 at 15:18
  • Thank you, it's important to set it read-only but that didn't help to resolve the issue. – Andrew Mar 14 '13 at 16:49

To resolve this issue, I started to monitor switch by connecting to an internal IP address. I took it from the following configuration section:

unit 10 {        
    family inet {             

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.