In this case, I will be upgrading an SRX210H. This step is rather straight forward and If you require further clarification, please refer to the appropriate guide from Juniper Network’s Website.
First of all, Copy the JunOS Software into a USB FAT32 Formatted drive.
Make sure you have checked the integrity of the file by runnning md5sum, and compare it with the one listed on Juniper Network’s Website.
nish@WS /media/nish/JunOS $ md5sum junos-srxsme-11.4R9.4-domestic.tgz
nish@WS /media/nish/JunOS $
Go into the Shell prompt by issuing the command
nish@iNET> start shell if you are not already in there
Check the devices to see before plugging in the USB Drive containing JunOS.
% ls /dev/da*
/dev/da0 /dev/da0s1c /dev/da0s2c /dev/da0s3e /dev/da0s4a
/dev/da0s1 /dev/da0s2 /dev/da0s3 /dev/da0s3f /dev/da0s4c
/dev/da0s1a /dev/da0s2a /dev/da0s3c /dev/da0s4
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There are various reasons the Alarm light might come on. First to check, why you are seeing the alarm.
nish@iNET# run show system alarms
1 alarms currently active
Alarm time Class Description
2013-11-02 01:09:17 GMT Minor Autorecovery information needs to be saved
In the above case, it is because Autorecovery information is not saved.
This is accomplished by doing the following command
nish@iNET> request system autorecovery state save
Saving config recovery information
Saving license recovery information
Saving BSD label recovery information
This is the address which the clients should transmit for router solicitation.
You can see an example of JunOS DCHP Option 32 address configuration below.
set system services dhcp pool 192.168.1.0/24 option 32 ip-address 192.168.1.33
Android Push / WhatsApp Messages are getting delayed with connected to Wi-Fi Router. Messages get delivered when the phone screen is turned on.
I have managed to reproduce the problem and it turned out to be a Wi-Fi chip issue on the device(s) itself.
This is because the Phone in question (Nexus 4) stops responding to ARP request when the phone is on Sleep mode. This is due to Qualcomm Prima WLAN issue which affects all phones with this specific chip…
Only way to currently fix it is to add a Static ARP entry onto the Router. Given that it is supported on the router itself. Alternatively you can use Android Notification Fixer from the Play Store but for that to work, the phone needs to be rooted.
Please make sure you have Static IP / DHCP entry configured to the given IP(s), before adding the Static ARP entry
arp 192.168.1.30 20cf.303a.f1c9 arpa
set arp 192.168.1.30 mac 20cf.303a.f1c9 publish
DD-WRT / Linux
arp -i br0 -s 192.168.1.30 20cf.303a.f1c9
One of the favourite features about Junos when it comes to configuration management is the ability to manage configuration on a methodical manner. This is where the “COMMIT” configuration comes in and takes care of any unnecessary configuration mistakes which could have been made while performing a certain task.
To quote from Juniper’s website
When you commit the current candidate configuration, you can require an explicit confirmation for the commit to become permanent. This is useful if you want to verify that a configuration change works correctly and does not prevent access to the router. If the change prevents access or causes other errors, the router automatically returns to the previous configuration and restores access after the rollback confirmation timeout passes. This feature is called automatic rollback.
This feature will automatically rollback a “Candidate Configuration” unless the commit confirmed command is entered.
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It is possible to configure WPA2 (AES-CCMP) on a Cisco 877w Router and these are the steps required to achieve them.
First of all, do make sure you have the right IOS version. This is important because some versions of the IOS does not support the latest WPA2 Key Management type along with AES-CCMP Encryption. This configuration is based on the following IOS.
Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(22)T5, RELEASE SOFTWARE (fc3)
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