05-22-2017 05:01 PM
Since introducing vlans and static routes into my network setup with the sg300-10 I've noticed ICMP redirects and higher than expected response times. The redirect messages I see on pings from one vlan to another is what I believe to be the source of intermittent connectivity issues I'm experiencing. I've reviewed my configuration multiple times and have spent many hours here and on google for examples of how to implement intervlan routing but still can't seem to figure this one out. I would be thankful for any help in troubleshooting.
My setup: (See pdf for what I hope passes for more detail)
sg300-10 in L3 mode
Basic Netgear router with static route for each vlan
Apple Timemachine router (sits upstream from Netgear for internet access)
Example of redirect messages when pinging from system on vlan 1 to vlan 10 interface
92 bytes from 192.168.1.1: Redirect Host(New addr: 192.168.1.2)
Vr HL TOS Len ID Flg off TTL Pro cks Src Dst
4 5 00 0054 dbda 0 0000 3f 01 1307 192.168.1.118 192.168.10.1
06-08-2017 08:10 AM
Hi!
I´ve already seen your configuration but it seems you don´t have nay errors, could you share me a traceroute from the vlan 10,20,30 and 40 to the wan ip, just for be sure if there´s no sub optimal routing, and a ping test too.
greetings!
06-11-2017 09:03 AM
Hi joselgo2,
Here's an example of a tracert and pings from a device on vlan40 to the wan ip of 10.0.1.36 as well as the linksys gateway of 10.0.1.1. I thought the tracert for 10.0.1.1 looked odd but I'm not an expert on these things.
PS C:\Users\smithh> tracert 10.0.1.36
Tracing route to 10.0.1.36 over a maximum of 30 hops
1 1 ms 5 ms 5 ms 192.168.40.1
2 <1 ms <1 ms <1 ms 10.0.1.36
Trace complete.
PS C:\Users\smithh> ping 10.0.1.36
Pinging 10.0.1.36 with 32 bytes of data:
Reply from 10.0.1.36: bytes=32 time<1ms TTL=63
Reply from 10.0.1.36: bytes=32 time<1ms TTL=63
Reply from 10.0.1.36: bytes=32 time<1ms TTL=63
Reply from 10.0.1.36: bytes=32 time<1ms TTL=63
Ping statistics for 10.0.1.36:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
PS C:\Users\smithh> tracert 10.0.1.1
Tracing route to 10.0.1.1 over a maximum of 30 hops
1 1 ms 6 ms 5 ms 192.168.40.1
2 <1 ms <1 ms <1 ms 192.168.1.1
3 1 ms <1 ms 1 ms 10.0.1.1
Trace complete.
PS C:\Users\smithh> ping 10.0.1.1
Pinging 10.0.1.1 with 32 bytes of data:
Reply from 10.0.1.1: bytes=32 time=1ms TTL=253
Reply from 10.0.1.1: bytes=32 time=1ms TTL=253
Reply from 10.0.1.1: bytes=32 time=1ms TTL=253
Reply from 10.0.1.1: bytes=32 time=21ms TTL=253
Ping statistics for 10.0.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 21ms, Average = 6ms
06-11-2017 01:07 PM
To fix your example problem change your route statement (192.168.1.0 -> 0.0.0.0) on the Linksys router to point to the L3 switch.
06-11-2017 04:58 PM
Hi Lee,
The linksys won't allow me to add this route statement. Says it's invalid. I'm thinking I may be able to override this if I switch the linksys to a static IP instead of dhcp off my main internet router.
06-12-2017 07:52 AM
Can you change the gateway IP for network 192.168.1.0 to point to the L3 switch at 192.168.1.2 on the Linksys?
I have done this with a Cisco RV180 router and it works. I just don't remember the specifics. I am using pfsense right now.
PS
Is there a routing mode for the Linksys vs a gateway mode?
06-12-2017 08:20 AM
I just looked at my L3 switch and I was running DHCP off the switch not the router. Try hard coding an IP address in the Linksys using a gateway pointing to the L3 switch 192.168.1.2.
06-12-2017 12:22 PM
I now run my router in a separate VLAN using a 30 bit mask. I like it better this way instead of using VLAN1. But either should work.
06-10-2017 02:03 PM
You have a route statement on the Linksys where 192.168.1.0 is pointing to 0.0.0.0 so when on VLAN10 it has no way to get to your L3 switch. I think you need to point 192.168.1.0 to the L3 switch and let the layer 3 switch route out it's default gateway to the internet on the Linksys.
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