I recently installed a RB750Gr2 in a basic SOHO config and every couple of days hosts on my LAN will loose internet connectivity. When this happens browsers will fail to load pages and I cannot ping public hostnames or ip address's. The RBs interface will load and I have tried going into the console and pinging various sites and dns servers there to no avail. I have tried with my cable modem/router in bridge mode and router mode in router mode I have had the RB wan port on static and DHCP all with the same result. Prior to installing the RB i have run my network using just the isp modem/router, pfsense, and ubiquiti and never had any issues so I dont think the issue is the isp equipment. Any ideas what could cause this or what I should try the next time it happens?
Thanks
Re: RB750Gr2 Looses Internet Connectivity
also forgot to mention Im running v6.34.2
Re: RB750Gr2 Looses Internet Connectivity
Do you have IP on WAN interface when problem occurs? Is DHCP client on WAN interface? Whats the status of default route? Are you NATing traffic twice or MT is getting WAN IP from ISP? ( ISP - WANIP ->ISPModem<-private pool->RB->2nd private pool<-LAN)
Re: RB750Gr2 Looses Internet Connectivity
Do you have IP on WAN interface when problem occurs? Is DHCP client on WAN interface? Whats the status of default route? Are you NATing traffic twice or MT is getting WAN IP from ISP? ( ISP - WANIP ->ISPModem<-private pool->RB->2nd private pool<-LAN)
Yes I have had a ip on wan interface, it has happened with wan set to static and dhcp when modem was in router model (RB wan port > Modem/Router Lan port) and it has also happened with the modem/router set to bridge mode at which time the WAN port of RB gets a dynamic public address. RE:Do you have IP on WAN interface when problem occurs? Is DHCP client on WAN interface?
Im not certain what you mean, What should I test when this happens? should I check the routing tableWhats the status of default route?
Re: RB750Gr2 Looses Internet Connectivity
Yes, route should be checked via IP-ROUTES. Status of 0.0.0.0/0.
I haven't understood first part. Is your modem in routed or bridge mode?
I haven't understood first part. Is your modem in routed or bridge mode?
Re: RB750Gr2 Looses Internet Connectivity
Good idea thanks, I will check when the issue occurs. Currently modem is in bridge mode but I have experience this issue in both modesYes, route should be checked via IP-ROUTES. Status of 0.0.0.0/0.
I haven't understood first part. Is your modem in routed or bridge mode?
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[admin@MikroTik] /routing> /ip route print
Flags: X - disabled, A - active, D - dynamic,
C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme,
B - blackhole, U - unreachable, P - prohibit
# DST-ADDRESS PREF-SRC GATEWAY DISTANCE
0 ADS 0.0.0.0/0 69.243.104.1 1
1 X S 0.0.0.0/0 10.0.0.1 1
2 ADC 69.XXX.XXX.0/21 69.XXX.XXX.109 ether1 0
3 ADC 192.168.88.0/24 192.168.88.1 ether2-master 0
Re: RB750Gr2 Looses Internet Connectivity
just happened again, while connection was down. The output of was the same as it was when it was working.
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/ip route printRe: RB750Gr2 Looses Internet Connectivity
Hi,
OK, lets start with basic troubleshooting. In moments when connection is down can you ping your WAN GW? ( 69.243.104.1 ) or post output of
Also, how's DHCP configured on LAN side? Can you manually set IP on one PC just for testing purposes? Does masquerade rule getting hits when you do not have connection and trying to open some website?
OK, lets start with basic troubleshooting. In moments when connection is down can you ping your WAN GW? ( 69.243.104.1 ) or post output of
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ip route nexthop priRe: RB750Gr2 Looses Internet Connectivity
Hi,
OK, lets start with basic troubleshooting. In moments when connection is down can you ping your WAN GW? ( 69.243.104.1 ) or post output ofAlso, how's DHCP configured on LAN side? Can you manually set IP on one PC just for testing purposes? Does masquerade rule getting hits when you do not have connection and trying to open some website?Code: Select allip route nexthop pri
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[admin@MikroTik] > ip route nexthop pri
0 address=69.243.104.1 gw-state=reachable forwarding-nexthop=""
interface="" scope=10 check-gateway=none
All hosts are dynamic, some have static leases. I will try it one on static the next time it happens but if Im experiencing the issue when logged into the RB750 wouldent the firewall rules or DHCP not apply?
thanks
Re: RB750Gr2 Looses Internet Connectivity
Hmm I guess I should also tried unplugging the wan cable and plugging it directly into my computer to see if I get the same result when pinging the gateway......Ill try next time it happens
Re: RB750Gr2 Looses Internet Connectivity
If i got correctly, you can not ping WAN GW? That's issue with
A: connection to ISP or
B: with config of WAN interface
So, can you post relevant config ( just wan side) ?
Your assumption is right. Its not FW issue, its WAN side related. It's our goal to find out why there are outages on WAN side.
A: connection to ISP or
B: with config of WAN interface
So, can you post relevant config ( just wan side) ?
Your assumption is right. Its not FW issue, its WAN side related. It's our goal to find out why there are outages on WAN side.
Re: RB750Gr2 Looses Internet Connectivity
I dident have the issue prior to getting my routerboard when my whole network was running off of the ISP router, so it seems like its the routerboard. Possibly its an issue with the isp I could switch back to there router for a week and see if I have the same problemIf i got correctly, you can not ping WAN GW? That's issue with
A: connection to ISP or
B: with config of WAN interface
See attached screenshot and let me know if there is anything else in the config you would like to seeSo, can you post relevant config ( just wan side) ?
You do not have the required permissions to view the files attached to this post.
Re: RB750Gr2 Looses Internet Connectivity
This looks ok so far. Next time when outage occurs, try to disable enable DHCP client or renew IP.
ip dhcp-client renew
Looks like issue with DHCP lease.
You can also try with script like
Set it in scheduler to execute every 5-10 mins.
ip dhcp-client renew
Looks like issue with DHCP lease.
You can also try with script like
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:if ( [/ping 8.8.8.8 interface=wan count=5 ] = 0 ) do={/ip dhcp-client renew wan}Who is online
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