My network is under severe DDOS attack and link of 4MBPS is choked. Users are unable to get services.I applied TCP sync,CAR and Antispoofing ACL on my boundry router but all in vain.
You need to open a TAC case and have an engineer have a look at what's going on, it's impossible for us to tell what type of traffic is causing the problem from here, plus it would be far too slow of a process for us to help you out this way.
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