Not able to ping the link between 12-port 3750 switch and ASR-9010 router with 9000 mtu

[cwgrdpmum]

I have one 12-port 3750 switch having one gig connectivity with ASR-9010 router having IOS-XR. I am not able to ping this link with 9000 mtu size. I have enable system mtu jumbo on switch to 9000 and on ASR router interface mtu is set to 9114.

At switch side switch interface is configured as a trunk port and one vlan has been passed on that interface.

SW1#sh run int gi1/0/10

Building configuration...

Current configuration : 152 bytes

!

interface GigabitEthernet1/0/10

switchport trunk encapsulation dot1q

switchport trunk native vlan 10

switchport mode trunk

speed nonegotiate

end

SW1#sh run int vlan 10

Building configuration...

Current configuration : 64 bytes

!

interface Vlan10

ip address 172.16.10.1 255.255.255.240

end

I am not able to ping the ip 172.16.10.2 with 9000 mtu size.

Kindly provide me the solution for same.

Thanks in advance...Amol

[cwgrdpmum]

Hello ,

Pls reply someone...

[Aileron88]

Try pinging 172.16.10.2 with a range of MTU sizes. Are you able to ping it at all?

[cwgrdpmum]

Hello Adam ,

Thanks for ur reply. I am not able to ping more than mtu size of 1998. It's only pinging with 1998 mtu size.

[athai2018]

You can check MTU "show system mtu" on sw3750 and "show inter vlan 10" . Maybe 1998mtu is system MTU size

[cwgrdpmum]

I have set the MTU size to 9000 by using command sysytem mtu jumbo 9000 and int vlan mtu size is 1500.

[athai2018]

So you can increase mtu on interface vlan 9000, after you can check ping size 9000 again.