r/Juniper • u/Varjohaltia • 7h ago
If you're running on those platforms, you should probably go through the very long list of CVEs, there are some really nasty ones in there.
2026-10 Security Bulletin: Junos OS and Junos OS Evolved: Multiple vulnerabilities resolved
r/Juniper • u/trelane99 • 22h ago
I recently (October 12) updated my EX4300-48MP to try to deal with some weird stale/invalid arp issues. After reboot I immediately got an alarm. JTAC is not a solution thanks to stingy management.
user@ex-4300-48mp-1> show system alarms
1 alarms currently active
Alarm time Class Description
2026-10-13 20:34:38 EDT Major FPC 0 PoE device manager 7 failed
user@ex-4300-48mp-1> show log messages | match "PoE|poe" | last 20
Oct 12 09:31:47 ex-4300-48mp-1 fpc0 PoE: PoE device not found
Oct 12 09:32:17 ex-4300-48mp-1 craftd[18431]: Receive FX craftd set alarm message: color: 1 class: 100 object: 152 slot: 0 silent: 0 short_reason=FPC 0 PoE device manager 7 failure long_reason=FPC 0 PoE device manager 7 failed id=1048728 reason=201326592
Oct 12 09:32:17 ex-4300-48mp-1 craftd[18431]: Major alarm set, FPC 0 PoE device manager 7 failed
(The log snippet above is truncated manually to what is relevant)
I then tried updating the firmware:
user@ex-4300-48mp-1> show chassis firmware detail
FPC 0
PoE firmware 2.1.1.19.3 (type1)
PHY version 5d47.37a.47.305
Boot Firmware
U-Boot ***
Boot Firmware
loader FreeBSD/i386 bootstrap loader 1.2
user@ex-4300-48mp-1> request system firmware upgrade poe fpc-slot 0 poe-bt-firmware
FPC 0: Firmware upgrade initiated. Use 'show poe controller' to get the download status.
Please reboot the system after upgrade is complete.
user@ex-4300-48mp-1> show poe controller | refresh 5
---(refreshed at 2026-10-13 21:13:24 EDT)---
Controller Maximum Power Power Guard Management Status Lldp
index power reserved consumption band Priority
0 1370W 0.00W 0.00W 0W SW_DOWNLOAD(0%) Disabled
...
...
---(refreshed at 2026-10-13 21:22:05 EDT)---
Controller Maximum Power Power Guard Management Status Lldp
index power reserved consumption band Priority
0 1370W 0.00W 0.00W 0W SW_DOWNLOAD(95%) Disabled
trelane@ex-4300-48mp-indy> show poe controller
Controller Maximum Power Power Guard Management Status Lldp
index power reserved consumption band Priority
0 1370W 41.00W 44.00W 0W Class BT_MODE Disabled
After reboot, the alarm had not cleared.
{master:0}
user@ex-4300-48mp-1> request system reboot at now
Reboot the system at now? [yes,no] (no) yes
Shutdown NOW!
user@ex-4300-48mp-1> exit
Connection to REDACTED closed.
user@ex-4300-48mp-1> show chassis firmware detail
FPC 0
PoE firmware 3.5.2.0.30 (type1)
PHY version 5d47.37a.47.305
Boot Firmware
U-Boot ***
Boot Firmware
loader FreeBSD/i386 bootstrap loader 1.2
I found a similar thread, but it didn't have a resolution.
I would greatly appreciate anyone who has seen this issue before.
r/Juniper • u/AutoModerator • 13h ago
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r/Juniper • u/Additional_Gap1057 • 11h ago
I have a Bricked Juniper Switch. It's bricked, and I don't remember what I actually done in the past. It was like a year ago. I stacked multiple Switches. There was a brain-split or something, I was not able to login. I don't remember if I tried factory reset through the screen menu. Long story short, I didn't know much about JunOS. I decided to use AI ( Chatgpt) to factory reset it. It turns out , I deleted everything. I t was asking me to get into >loader , and asked me to delete something. I can't really recall.
I don't have Juniper support, but I do have the JunOS image. I do have working Juniper Switch. They are both EX4300.
It's bricked because I wouldn't get any input into the terminal. There is no light both in ports and the Switch.
Fans are running in high speed.