R2511-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V5)
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Configuring the DHCP relay agent to work with authorized ARP ···································································· 52
Enabling unauthorized DHCP server detection ·································································································· 53
Enabling DHCP starvation attack protection ······································································································ 53
Enabling client offline detection ··································································································································· 54
Configuring the DHCP relay agent to release an IP address ···················································································· 55
Configuring the DHCP relay agent to handle Option 82 ·························································································· 55
Displaying and maintaining the DHCP relay agent ··································································································· 56
DHCP relay agent configuration examples ················································································································· 57
DHCP relay agent configuration example ·········································································································· 57
DHCP relay agent Option 82 support configuration example ········································································· 58
Troubleshooting DHCP relay agent configuration ······································································································ 59
Symptom ································································································································································· 59
Analysis ·································································································································································· 59
Solution ··································································································································································· 59
Configuring DHCP client ··········································································································································· 60
Introduction to DHCP client ··········································································································································· 60
Enabling the DHCP client on an interface ··················································································································· 60
Displaying and maintaining the DHCP client ·············································································································· 60
DHCP client configuration example ····························································································································· 61
Network requirements ··········································································································································· 61
Configuration procedure ······································································································································ 61
Verifying the configuration ··································································································································· 62
Configuring DHCP snooping ····································································································································· 63
Overview ········································································································································································· 63
Application of trusted and untrusted ports ·········································································································· 64
DHCP snooping support for Option 82 ·············································································································· 65
DHCP snooping configuration task list ························································································································ 66
Configuring DHCP snooping basic functions ·············································································································· 66
Configuring DHCP snooping to support Option 82 ··································································································· 67
Configuring DHCP snooping entries backup ·············································································································· 69
Enabling DHCP starvation attack protection ··············································································································· 69
Enabling DHCP-REQUEST message attack protection ······························································································· 70
Displaying and maintaining DHCP snooping ············································································································· 70
DHCP snooping configuration example ······················································································································ 71
Network requirements ··········································································································································· 71
Configuration procedure ······································································································································ 71
DHCP snooping Option 82 support configuration example ····················································································· 72
Network requirements ··········································································································································· 72
Configuration procedure ······································································································································ 72
Configuring BOOTP client ········································································································································· 73
BOOTP application ························································································································································ 73
Obtaining an IP address dynamically ························································································································· 73
Protocols and standards ················································································································································ 73
Configuring an interface to dynamically obtain an IP address through BOOTP ···················································· 74
Displaying and maintaining BOOTP client configuration ·························································································· 74
BOOTP client configuration example ·························································································································· 74
Network requirements ··········································································································································· 74
Configuration procedure ······································································································································ 74
Configuring IPv4 DNS ··············································································································································· 76
Overview ········································································································································································· 76
Static domain name resolution ····························································································································· 76
Dynamic domain name resolution ······················································································································· 76