Checking Whether Access to Some Web Pages Fails or Is Slow
Procedure
If only some web pages cannot be accessed or access to these web pages is slow, this problem may be caused by packet fragmentation. Run the display ip interface brief command to check whether the public network interface is a physical interface or dialer interface.
If the interface is a physical interface, run the tcp adjust-mss command on the interface to configure the maximum segment size (MSS) of TCP packets on the interface. The recommended MSS is 1200 bytes.
If the interface is a dialer interface, run the tcp adjust-mss command on the dialer interface to configure the MSS of TCP packets on the interface. The recommended MSS is 1200 bytes. In addition, run the mtu command to set the maximum transmission unit (MTU) to 1492 bytes.