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ping to gateway fails

suthomas1
Level 6
Level 6

Hi,

We have a vlan 10 - 192.168.5.1 /24 ( Static IP subnet ) on the core switch.

One pc is connected to a port (fa1/0/11) on an edge switch-ES01 ( which has this vlan 6 ) & assigned to vlan 6

Pc is given the ip 192.168.5.25 & gateway as 192.168.5.1

But, the pc is unable to ping the gateway. We tried with different laptop & also changed the fa1/0/11 interface to manual speed.

The configurations are as below:

On edge switch-ES01 where PC is connected ,

Int fa1/0/11

switch access vlan 6

desc test

On edge switch-ES01 port which uplinks to core ,

interface GigabitEthernet2/0/1

des Uplink to Core switch

switchport trunk encapsulation dot1q

switchport mode trunk

ip arp inspection trust

srr-queue bandwidth share 10 10 60 20

srr-queue bandwidth shape 10 0 0 0

queue-set 2

priority-queue out

mls qos trust cos

auto qos voip trust

channel-group 12 mode active

ip dhcp snooping trust

end

ip dhcp snooping vlan 1-999 is enabled on this edge switch

ip arp inspection is enabled for this vlan 6 in this edge switch

-----------------------------------

On Core Switch port connecting port to above edge switch:

interface GigabitEthernet2/3

switchport

switchport trunk encapsulation dot1q

switchport mode trunk

no ip address

wrr-queue bandwidth 5 25 70

wrr-queue queue-limit 5 25 40

wrr-queue random-detect min-threshold 1 80 100

wrr-queue random-detect min-threshold 2 100 10

wrr-queue random-detect min-threshold 3 50 60

wrr-queue random-detect max-threshold 1 100 10

wrr-queue random-detect max-threshold 2 100 10

wrr-queue random-detect max-threshold 3 60 70

wrr-queue cos-map 1 1 1

wrr-queue cos-map 2 1 0

wrr-queue cos-map 3 1 4 7

wrr-queue cos-map 3 2 2

wrr-queue cos-map 3 3 3

wrr-queue cos-map 3 4 6

mls qos trust cos

storm-control broadcast level 5.00

storm-control multicast level 5.00

channel-group 12 mode active

Please help on this. thanks in advance.

3 Replies 3

Jon Marshall
Hall of Fame
Hall of Fame

We have a vlan 10 - 192.168.5.1 /24 ( Static IP subnet ) on the core switch.

One pc is connected to a port (fa1/0/11) on an edge switch-ES01 ( which has this vlan 6 ) & assigned to vlan 6

Is there a typo in the above ie. you say it is vlan 10 on the core switch but vlan 6 on the other switch. It can't be both. If it is that is why you are not able to ping. 

Jon

Jose Solano
Level 4
Level 4

Hi,

I see that you have the laptop on vlan 6, and the gateway of that laptop is vlan 10 ip add 192.168.5.1/24 ?? Your gateway should be on the same vlan, you cannot have a laptop on vlan 6 and his gateway is vlan 10 there is no way this can ping its gateway since you they are on different vlans. You will need to have a SVI for vlan 6 on the core switch with a different subnet to achieve this.

What about if you put that laptop on vlan 10 an try again with the same ip on the laptop.

Regards,

Sorry folks, it was a typo & was meant to be vlan 6 all the way.

I resolved it by removing arp inspection for this vlan .

Thanks for your help.