Brocade Communications Systems 6650 manual Packet type Rate limit, Arp

CPU rate-limiting

CPU rate limiting identifies the traffic type and assigns a maximum rate limit to the traffic type. The traffic types which are subjected to rate limiting include broadcast ARP and other exceptions, such as TTL exceed, IP MTU failed, reverse path check failed, IP fragments, and unsupported tunneling. Each of these types is rate-limited individually.

Table 68 shows the rate limits for each rate-limited packet type and the platforms to which each rate limit applies. These rates cannot be configured by users currently.

TABLE 68 CPU rate limits for packet type and applicable platforms

Packet type	Rate limit in
	packets per second
ARP	6000
IP TTL exceed, or	150
Reverse path check failed
IP MTU exceed,	3000
IP tunnel-terminated packets which are fragmented or has options, or
IP tunnel-terminated packets with unsupported GRE tunnel header
IP Unicast packets mirrored to CPU due to ICMP redirect	100
Bridge packets forward to CPU	5000

278	Brocade ICX 6650 Security Configuration Guide
	53-1002601-01