Re: SRX slow on some webpages

Hi Etoghi,

In most of these pppoe cases , it is usually seen that the large mss size advertised between the client and server causes the fragmentation and hence the web pages are slow to open.
Please check the negotiated MTU size on the PPPOE and set the MSS size accordingly.

MSS in PPPOE = MTU - 40 ( without vlan tag)

MSS in PPPOE = MTU - 44 ( with vlan tag)

Calculate the MSS using above method and set the MSS on the SRX using the command

set security flow tcp-mss all-tcp mss

Let me know if you still observe the slowness. Please take a pcap on the next-hop interface or on the SRX egress interface to identify the problem.

Regards
Hemant