MTU 1496 will cause slowness in Wired mode.

[palani2010]

MTU 1496 will cause slowness in Wired mode.

[balaji.bandi]

You need to post more interfaces, what interface config, where this interface is connected  ? and what is slow?

is this connected to ISP ?

commonly used :

ip mtu 1492
ip tcp adjust-mss 1452

[palani2010]

Issue 0- Trying to access External URL with both wired and wireless but wired user facing slowness by accessing public hosted URL.

Note - Network Path will be the same for both wired and wireless

Interface Config

sh running-config interface vlan 2178
Building configuration...
Current configuration : 321 bytes
!
interface Vlan2178 --- Wired LAN Users
no ip redirects
no ip proxy-arp
ip mtu 1496
ip pim sparse-mode
end

sh running-config interface vlan 2256
Building configuration...
Current configuration : 307 bytes
!
interface Vlan2256 -- Wireless LAN Users
no ip redirects
no ip proxy-arp
ip pim sparse-mode
end

Please let us know if you any need any information from my end...

Thanks in advance !!!

[Reza Sharifi]

ip mtu 1496

What is the reason for changing the default interface MTU from 1500 to 1496?

HTH

[Joseph W. Doherty]

"Trying to access External URL with both wired and wireless but wired user facing slowness by accessing public hosted URL."

I would more or less expect a slow down as you've reduced the MTU on the wired SV (and TCP mss-adjust not set).  As @Reza Sharifi asks, why are you doing this?

[palani2010]

Not sure the MTU value was set as it was proda uction environment.

Changing MTU 1496 to 1500 will fix an issue?

Can you explain to me TCP mss-adjust not set in brief for my reference?

[Reza Sharifi]

So, the first test would be to delete the command from the SVI interface.  "no ip mtu 1496"

and see anything changes. What type of device is this? Is this device facing the Internet?

Do you have a diagram of the network?

HTH

[Joseph W. Doherty]

"Can you explain to me TCP mss-adjust not set in brief for my reference?"

It can avoid IP packet fragmentation and/or PMTUD recovery.  I.e. when you knowingly run a MTU smaller than expected, the TCP mss-adjust command often will negate performance issues (at least for TCP).

[balaji.bandi]

in your case i would setup back to MTU 1500 (if this not requirement to change MTU) and test it