Epmp 3000 high ping

Products ePMP
6

Here are mine:

 SEQ HOST                                     SIZE TTL TIME  STATUS             
    0 172.19.125.74                              56  64 22ms 
    1 172.19.125.74                              56  64 136ms
    2 172.19.125.74                              56  64 19ms 
    3 172.19.125.74                              56  64 23ms 
    4 172.19.125.74                              56  64 48ms 
    5 172.19.125.74                              56  64 56ms 
    6 172.19.125.74                              56  64 86ms 
    7 172.19.125.74                              56  64 5ms  
    8 172.19.125.74                              56  64 25ms 
    9 172.19.125.74                              56  64 42ms 
   10 172.19.125.74                              56  64 19ms 
    sent=11 received=11 packet-loss=0% min-rtt=5ms avg-rtt=43ms max-rtt=136ms
7

cambium PP
cambium PP1122×793 36 KB
cambium sm
cambium sm1122×793 101 KB
cambium ws
cambium ws1122×793 21.1 KB

8

Your first pic shows you have a ton of download and upload interference. That SM will most definitely have higher ping and latency. Locking your upload MCS rate down will help some.

9

Hello, thanks for reply. We just made it with Sebastian from Cambium. Let see how it works. Thx again.

10

Here is some shots from my subscriber side…

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image2112×1291 148 KB

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image976×399 8.62 KB

PING 32(60) bytes of data.
40 bytes from : icmp_req=1 ttl=64 time=43.9 ms
40 bytes from : icmp_req=2 ttl=64 time=22.2 ms
40 bytes from : icmp_req=3 ttl=64 time=20.7 ms
40 bytes from : icmp_req=4 ttl=64 time=25.2 ms

— ping statistics —
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 20.754/28.043/43.972/9.337 ms

This customer is about 10km from tower… I have a SM 1.5km from tower great stats and same ping…here are the stats

PING 32(60) bytes of data.
40 bytes from 10.60.14.64: icmp_req=1 ttl=64 time=17.6 ms
40 bytes from 10.60.14.64: icmp_req=2 ttl=64 time=21.2 ms
40 bytes from 10.60.14.64: icmp_req=3 ttl=64 time=24.5 ms
40 bytes from 10.60.14.64: icmp_req=4 ttl=64 time=28.1 ms
40 bytes from 10.60.14.64: icmp_req=5 ttl=64 time=55.9 ms

— ping statistics —
5 packets transmitted, 5 received, 0% packet loss, time 4006ms
rtt min/avg/max/mdev = 17.676/29.532/55.979/13.673 ms

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image1321×378 20.3 KB

11

Hello We have the same problem with our ping on 3 different epmp3000 sectors.
Registered Subscriber Modules 25

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image1461×891 126 KB

image

12

Hi Hu - I’m wondering why do you have a mix/match of firmware version on the SM’s?

I mean - I think we are all finding the latency too high and too inconsistent (so I’m not suggesting the firmware mix/match is the cause) but that being said – I’ve always found that having all firmware versions match is always the best chance for things to work correctly. I’m wondering why you are running a mix of firmwares?

3 Likes
13

Olá estou como o mesmo problema.

Hello I am like the same problem.

14

A ping of 17-25 MS is the normal operating value for ePMP. You can only slightly improve the result by minimizing retransmission of packets for both the upstream and downstream link. This can be done by reducing the value of the maximum modulation.

!!!also, stable operation requires using the same firmware version on the AP and SM!!!

15

Only if going to Epmp, like no other network, would a ping of 17-25 be normal.

16

This is a payment for the ability to provide stable communication for more than 20 clients per sector in any conditions.

1 Like
17

@Ryan_Ray, so you can use 450m subscriber module with an epmp 3000? The latency improvement is incredible!

18

No, we have separate areas that we use ePMP or 450m depending on cost sensitivity / performance needs. Our 450 network constantly performs better, doesn’t need handholding or changing. If I did it all again we would have went 450 for all right off the bat.

19

@Ryan_Ray, thank you for your response! I am feeling the same way, went all epmp, ptp 550 and we are a bit disappointed in a few areas, especially the ping/latency. The budget was not compatible with the 450 lineup but definitely want to move into that arena soon. If you dont mind me asking, what do you use for your Backhaul solution?

20

PTP820 c or s and siklu.

21

Is the 820 c/s licensed only radios?

22

Yes (20 character limit…)

23

Again, appreciate your input! I am wondering if epmp 2000 would be an option for a solution for a single sector deployment instead of a epmp 3000 or 3000L…

24

We’ve seen dependable latency and good performance from the 2000. Better than the 3000.

1 Like
25

Thanks appreciate it, I was looking at the specs for the epmp 2000 and didnt see frequency reuse… I am correct in that it does not support it?