Re: MR1100 Loses Carrier Aggregation

sgp001 · ‎2021-08-23

Hello,

My model : MR1100-100EUS_01.01.80.00 with NTGX50C_12.06.11.00

My provider: Austria A1

When I reboot the device or when I change the band configuration, I get CA. For example:

Current Time: 534372 Mode: ONLINE
System mode: LTE PS state: Attached
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv

PCC: LTE band: B3
LTE bw: 20 MHz
SCC1:
LTE band: B7
LTE bw: 20 MHz
SCC2:
LTE band: B3
LTE bw: 15 MHz

After a random time (between 30 minutes - 90 minutes) the MR1100 looses CA and stays with the PCC band only.

For example 1 hour later:

Current Time: 537957 Mode: ONLINE
System mode: LTE PS state: Attached
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv

PCC:
LTE band: B3
LTE bw: 20 MHz

The only way to have it back working on 3CA is to :

- Reboot

- Change "Band Region" to another settings (like "Auto") and set it back to "LTE All"

After doing above, it's back to 3CA for a while but quickly bug is back.

With my mobile phone and the same operator CA works fine. BTW, I already reset the router and configured from scratch and it's the same

According to the statement of the Austrian provider A1 this is a power saving feature to switch CA off after some period of time.

Obviously, this change was rolled out by our operator begining of July across the whole country. I would assume that other operators in other countries will start with the same behavior.

I'm hoping that NETGEAR support can look at this. I am not the only person who experience this, in an Austrian forum around 20 people complain about the same behavior for MR1100.

Thanks.

RichiP1 · ‎2021-08-23

i have the exact same problem and a guy of them in Austria

sgp001 · ‎2021-08-25

Dear Support! Can you help with this issue?

Kind regards

AyeAyeAye · ‎2021-08-27

@JohnPeng

sgp001 · ‎2021-09-02

Dear @JohnPeng , problem is still there.

The provider confirmed that they switch off Carrier Aggregation due to power saving reasons. Also providers in Germany (T-Mobile and Vodafone) are testing this behaviour. For mobile phones it does not matter (because they reconnect to CA if needed). But the MR1100 does not reconnect back to carrier aggregation and stays on the first band.

In the meantime I wrote a small bash script which checks if CA is still connected. If not, then I switches bands to have CA again. I let it run on an hourly basis.

Can you help us? Running this script is not a permanent solution.

#!/bin/bash

# Get status of MR1100 via telnet
# Save the results in the variable output1
output1=$(( echo open 192.168.1.1 5510
sleep 1;
echo "at!gstatus?";
sleep 1;
echo "exit" ) | telnet )

echo $output1

# Match the results of at!gstatus with the expected connection pattern
# In this case check if twice connected to B3
# If yes then exit this script
if [[ "${output1}" =~ B3(.|\n)*B3 ]]; then
    echo "matched - all good"
    exit 0
fi

sleep 3;

# Connection pattern is not in line with expected behaviour
# First check which band is currently selected
# We switch here between band=00 --> auto and the band=03
# Define variable to select the custom band
band_selector="03"

# Check which band we are connected to right now
output2=$(( echo open 192.168.1.1 5510
sleep 1;
echo "at!band?";
sleep 1;
echo "exit" ) | telnet)

echo $output2

# Band 3 has the custom name LTE B3. In case band=03 is connected switch over to AUTO
# and vice-versa
if [[ "${output2}" =~ LTE[[:blank:]]B3 ]]; then
    band_selector="00"
    echo "B3 - switche auf AUTO"
fi

sleep 3;

# Now switch the band to the opposite
# Means if band=03 then switch to band=00 and vice-versa
output3=$(( echo open 192.168.1.1 5510
sleep 1;
echo "AT!BAND=$band_selector";
sleep 5;
echo "at!gstatus?";
sleep 2;
echo "exit" ) | telnet)

echo $output3

# Send the results pers mail

/usr/sbin/ssmtp your-email-addr@gmx.net <<EOM
Subject:Status MR1100 aktualisiert
$output1
******************************
$output2
******************************
$output3
EOM
exit 1

JohnPeng · ‎2021-09-02

Thanks all for reporting the issue. We were not aware of this before.

Will investigate and get back to you soon. If needed, we will release a MR to fix the issue.

Thanks

John

davide84 · ‎2021-09-18

I have the same problem in the US with ATT and the MR5100.

After some hours or so, my mr5100 stops doing carrier aggregation and I get stuck with slow speeds.
Only way to get it back to carrier aggregation is to reboot the router. Very annoying.

JohnPeng · ‎2021-09-22

@davide84 wrote:
I have the same problem in the US with ATT and the MR5100.

After some hours or so, my mr5100 stops doing carrier aggregation and I get stuck with slow speeds.
Only way to get it back to carrier aggregation is to reboot the router. Very annoying.

Thanks for reporting the issue on AT&T M1 and M5. We will try to reproduce and find the root cause of it. But not sure whether this is caused by network since CA is triggered on the network side.

Thanks

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MR1100 Loses Carrier Aggregation

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