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SDWAN cisco problem VOIP

anhbt00011
Level 1
Level 1

Hi every one. I have a problem. Everyone can help me ?
I have 2 site A and B connect by vpn internet and MPLS point to point over 2 router SD WAN.
PBX site A trunking with PBX site B. If i set PBX site A connect to PBX site B over MPLS, everthing is OK.
But 2 site connect over internet have a problem. Sometime , Ext in site A call Ext in site B is OK, but Ext in site B cannot call to Ext in site A and sometime call between 2 site is OK over internet.
I scare due to features of sd wan is loadbalance. Data from site A to site B that goes through all 3 ISPs.
Has anyone encountered this problem yet ? How to fix it?

 

1 Reply 1

Lei Tian
Cisco Employee
Cisco Employee

Hello,

Did you check the MTU size over internet links? Try turn on pmtud see if that helps. 

 

HTH,

Lei Tian

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