Hi everyone, I wonder if anyone can help me out here. I have attached a screenshot that provides the topology and ip addresses etc..
Basically I am not able to ping host from switch if I source it from another SVI. Similarly, From host I can only ping its default SVI. All the other SVIs wont' respond to ping. However I am able to ping all SVIs from my access layer switch.
IP addresses etc can be found in the attached image.. In this instance, I am able to ping the server ip from my MLS 3850 switch but if I source it from another SVI then ping fails. It seems like 3850 switch is not routing between vlans.. I have manually typed IP routing several times.
Then again it seems that it is routing properly as I am able to ping all SVIs from my access layer switch.. However my PC and server are not able to ping anything beyond their SVI addresses.
Hope all that makes sense.. If not I will try and upload the configs when I can be by the switches.. Please kindly point me in right direction. Thanks in advance.
p.s. on MLS 3850 - default route is set using command - IP route 0.0.0.0 0.0.0.0 10.205.55.1
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" eventhough SVI 30 is showing as UP I don't have any live interfaces in that vlan. I find that quite strange. I always"
Thats ts because vlan 30 is included in the trunk so this will activate vlan 30 if you removed it from the trunk and didn't assigned any access port to it it will gone down
Is the 3560 running as access switch (no ip routing enabled) and all trunk encapsulation and vlans are being propergated across the trunks?
Sh run - Sh int trunk - sh vlan brief
Sh sdm prefer
Hi Paul, Thank you for your reply. I may perhaps have "ip routing" enabled on 3560. I will check it tomorrow morning.. Should that make a difference when I ping the Server IP (vlan 20 ) from my 3850 switch and I provide the source address of vlan 10 SVI.
Also I can confirm that trunks had all vlans allowed.. and vlans 10, 20 and 30 were active. All SVIs on 3850 were showing as up and up.
Whilst researching this issue, I have come across another thread..
That user had almost identical issue..
"may perhaps have "ip routing" enabled on 3560. I will check it tomorrow morning.. Should that make a difference when I ping the Server IP (vlan 20 ) from my 3850 switch and I provide the source address of vlan 10 SVI."
Yes because if you have ip default-gateway and ip routing enabled then the gateway won't be used as the switch is looking for a next hop address via a static route or from a routing protocol. Ip default-gateway = L2 switch (host switch) --- Ip routing = L3 switch-
Great that makes sense. I will check that..
Any idea why my 3850 not able to ping the server if the ping is sourced from different SVI (ie.. int vlan 10 ip on the 3850 switch).