Hi There
We're a small VoIP Provider using a ASG220 HA cluster (still 6.302) and we're quite happy with it.
Now, as business goes on, we're growing and growing and from week to week there is more and more traffic.
Our ASG220 is in a quite simple routing configuration: Public Access to the Provider, DMZ with Public IP's which are just routed, 3 direct patchings to partner networks also using public IP's and static routes, and a few IPsec tunnels which aren't used that much. So, basically a router with packetfiltering [:)]
What concerns me is the amout of traffic we're having. From customerprojects i got the experience that VoIP (SIP/RTP and IAX2) is a very fragile kind of traffic. 50Packets/sec with around 200byte payload in- and outbound per call. Jitter and packetloss: big issue! Especially when using shaping, quite a lot of small firewalls are having troubles keeping the RTP-Packets in a row.
Now we already have around 12Mb/sec just this kind of traffic. Simple calculation would result in, rough said, 5'000 to 8'000 UDP packets/sec, each with around 200byte payload.
12Mbit would not be that much for a single TCP session, but its very tough for the kind traffic we're having.
Unfortunately the SNMP agent seems to be kind of broken and couldn't do a reboot of the Firewall yet - so i have no idea how much the CPU itself is used. But what i can see in the Daily Reports that the system is running with a load around 1 - 1.2 in peak times.
My question is basically how much such traffic can a ASG220 handle? do you have done some performance testing with different kind of traffic? about which amount of traffic can we expect the firewall dropping/delaying RTP packets?
Thanks for any feedback
Cheers
Maldex
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