Issues with Juniper SRX and Zoom Meetings
Hey All,
I am experiencing a weird issue, and I can't for the life of me track down what is going on. Some brief background:
- I have a Juniper SRX340 running JUNOS 23.4R2
- I join my meeting via my Mac which is a 2023 M3 Pro with 36GB of RAM
- From my Juniper SRX I connect to 2 Arista 7280's in an MLAG setup, which feeds my Arista 720 and Arista C330 AP's
- I am joining all my meeting via Wifi - where my recent speed/bufferbloat test show nearly 1Gbps symetrical and A+ rating for no bufferbloat.
Symptoms:
During my Zoom meetings calls will typically start relatively normal. At some point during the call, but always within the first 30 minutes, I will start to hear choppy audio and frozen video and I get the message "Your Internet Connection is Unstable". Ultimately after a few minutes of really choppy audio, the call drops and reforms. Sometimes this is the end of it, sometimes it isn't and this cycle can go on for 15-30 minutes.
On the network side of things, I look at my logs and I see my port-channel/AE has dropped due to LACP timeout. This is odd, since there is no queue exhaustion, between the Juniper SRX and the Arista 7280's. I escalated a case with Arista and it seems to be a Juniper issue.
That being said - Zoom is the only teleconferencing service that causes issues. I can use Hangouts and Teams without any issues like with Zoom. Some things I have noticed since trying to track this down:
- Zoom client has created 4 flows for 1 Zoom call. I don't think this is normal, and may be a side effect of the dropping issue
show security flow session destination-port 8801
Session ID: 167503915625, Policy name: trust-to-untrust/5, Timeout: 24, Session State: Valid
In: 192.168.0.27/57932 --> 144.195.35.200/8801;udp, Conn Tag: 0x0, If: ae0.3, Pkts: 973, Bytes: 119980,
Out: 144.195.35.200/8801 --> x.x.x.x/21336;udp, Conn Tag: 0x0, If: pp0.0, Pkts: 101537, Bytes: 31256905,
Session ID: 167503917921, Policy name: trust-to-untrust/5, Timeout: 24, Session State: Valid
In: 192.168.0.27/65355 --> 144.195.35.200/8801;udp, Conn Tag: 0x0, If: ae0.3, Pkts: 953, Bytes: 117362,
Out: 144.195.35.200/8801 --> x.x.x.x/24698;udp, Conn Tag: 0x0, If: pp0.0, Pkts: 952, Bytes: 108550,
Session ID: 167503918701, Policy name: trust-to-untrust/5, Timeout: 24, Session State: Valid
In: 192.168.0.27/63968 --> 144.195.35.200/8801;udp, Conn Tag: 0x0, If: ae0.3, Pkts: 953, Bytes: 117359,
Out: 144.195.35.200/8801 --> x.x.x.x/21022;udp, Conn Tag: 0x0, If: pp0.0, Pkts: 952, Bytes: 108547,
Session ID: 167503920196, Policy name: trust-to-untrust/5, Timeout: 24, Session State: Valid
In: 192.168.0.27/51674 --> 144.195.35.200/8801;udp, Conn Tag: 0x0, If: ae0.3, Pkts: 48911, Bytes: 28251944,
Out: 144.195.35.200/8801 --> x.x.x.x/4207;udp, Conn Tag: 0x0, If: pp0.0, Pkts: 112652, Bytes: 88112545,
Total sessions: 4
Routing seems to be okay as well
inet.0: 52 destinations, 52 routes (52 active, 0 holddown, 0 hidden)
192.168.0.27/32 (1 entry, 0 announced)
*Access-internal Preference: 12
Next hop type: Router, Next hop index: 0
Address: 0x4cd8d34
Next-hop reference count: 30, Next-hop session id: 0
Kernel Table Id: 0
Next hop: 192.168.0.1 via ae0.3, selected
Session Id: 0
State: <Active NotInstall Int NSR-incapable>
Age: 3w4d 2:37:06
Validation State: unverified
Task: RPD Unix Domain Server./var/run/rpd_serv.local
AS path: I
Route-nexthop:
Router (0x4cd8d34) 192.168.0.1
Thread: junos-main
No drops in queues and the interface is hardly being used
show interfaces ae0 extensive
Physical interface: ae0, Enabled, Physical link is Up
Interface index: 129, SNMP ifIndex: 559, Generation: 132
Description: LAG to Arista 720XP
Link-level type: Ethernet, MTU: 1518, Speed: 2Gbps, BPDU Error: None, Ethernet-Switching Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Disabled, Minimum links needed: 1, Minimum bandwidth needed: 1bps
Device flags : Present Running
Interface flags: SNMP-Traps Internal: 0x0
Current address: 12:39:e9:59:3b:a3, Hardware address: 12:39:e9:59:3b:a3
Last flapped : 2025-09-16 12:49:14 MDT (2w6d 01:36 ago)
Statistics last cleared: Never
Traffic statistics:
Input bytes : 63064012289 130904 bps
Output bytes : 929159615281 104536 bps
Input packets: 246368883 91 pps
Output packets: 762012547 50 pps
Dropped traffic statistics due to STP State:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets: 0
Input errors:
Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 0, Resource errors: 0
Output errors:
Carrier transitions: 17, Errors: 0, Drops: 0, MTU errors: 0, Resource errors: 0
Ingress queues: 8 supported, 4 in use
Queue counters: Queued packets Transmitted packets Dropped packets
0 0 0 0
1 0 0 0
2 0 0 0
3 0 0 0
Egress queues: 8 supported, 4 in use
Queue counters: Queued packets Transmitted packets Dropped packets
0 761204716 761204716 0
1 0 0 0
2 0 0 0
3 952646 952646 0
I don't have CPU grpahs, but I don't see any CPU warnings in the logs, etc... Hoping someone has seen something like this before and can help out.
TIA