HP 10500 Series Configuration Manual page 6

Configuring DHCP snooping entries backup ·············································································································· 78
Enabling DHCP starvation attack protection ··············································································································· 79
Enabling DHCP-REQUEST message attack protection ······························································································· 80
Configuring DHCP packet rate limit ····························································································································· 80
Displaying and maintaining DHCP snooping ············································································································· 81
DHCP snooping configuration examples ····················································································································· 82
DHCP snooping configuration example ············································································································· 82
DHCP snooping Option 82 support configuration example ············································································ 82
Configuring IPv4 DNS ··············································································································································· 84
Overview········································································································································································· 84
Static domain name resolution····························································································································· 84
Dynamic domain name resolution ······················································································································· 84
Configuring the IPv4 DNS client ·································································································································· 85
Configuring static domain name resolution ········································································································ 85
Configuring dynamic domain name resolution ·································································································· 86
Setting the DSCP value for DNS packets····················································································································· 86
Displaying and maintaining IPv4 DNS ························································································································ 87
IPv4 DNS configuration examples ······························································································································· 87
Static domain name resolution configuration example ····················································································· 87
Dynamic domain name resolution configuration example ··············································································· 88
Troubleshooting IPv4 DNS configuration ···················································································································· 91
Symptom ································································································································································· 91
Solution ··································································································································································· 91
Configuring IP forwarding basics ····························································································································· 92
FIB table ·········································································································································································· 92
Displaying and maintaining the FIB table ··················································································································· 92
Configuring IP performance optimization ················································································································ 94
Enabling receiving and forwarding of directed broadcasts to a directly connected network ······························· 94
Enabling receiving of directed broadcasts ········································································································· 94
Enabling forwarding of directed broadcasts ······································································································ 94
Configuration example ········································································································································· 95
Configuring TCP attributes ············································································································································ 95
Configuring TCP path MTU discovery ················································································································ 95
Configuring the TCP send/receive buffer size ··································································································· 96
Configuring TCP timers ········································································································································· 97
Configuring ICMP to send error packets ····················································································································· 97
Advantages of sending ICMP error packets ······································································································· 97
Disadvantages of sending ICMP error packets ·································································································· 98
Configuration procedure ······································································································································ 99
Enabling support for ICMP extensions ························································································································· 99
ICMP extensions for MPLS ···································································································································· 99
Handling ICMP messages ···································································································································· 99
Configuration procedure ···································································································································· 100
Displaying and maintaining IP performance optimization ······················································································ 100
Configuring UDP helper ········································································································································· 102
Configuration restrictions and guidelines ·················································································································· 102
Configuration procedure ············································································································································· 102
Displaying and maintaining UDP helper ··················································································································· 103
UDP helper configuration example ···························································································································· 103
Network requirements ········································································································································· 103
Configuration procedure ···································································································································· 103
Configuring IPv6 basics ·········································································································································· 105
Overview······································································································································································· 105
iv