2.16. DHCPRELAY

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2.16. DHCPRELAY

These log messages refer to the DHCPRELAY (DHCP relayer events) category.

2.16.1. unable_to_save_dhcp_relay_list (ID: 00800001)

Default Severity: WARNING
Log Message: Unable to auto save the DHCP relay list to disk
Explanation: Unable to autosave the DHCP relay list to disk.
Firewall Action: None
Recommended Action: Check disk usage and health.
Revision: 1

2.16.2. dhcp_relay_list_saved (ID: 00800002)

Default Severity: NOTICE
Log Message: DHCP relay list was successfully auto saved to disk
Explanation: The DHCP relay list was successfully written to disk.
Firewall Action: None
Recommended Action: None
Revision: 1

2.16.3. dhcp_pkt_too_small (ID: 00800003)

Default Severity: NOTICE
Log Message: Received DHCP packet which is smaller than the minimum allowed 300 bytes.
Explanation: Received a DHCP packet which is smaller than the minimum allowed 300 bytes.
Firewall Action: drop
Recommended Action: Investigate what client implementation is being used.
Revision: 2
Context Parameters: Packet Buffer

2.16.4. incorrect_bootp_dhcp_cookie (ID: 00800004)

Default Severity: WARNING
Log Message: Incorrect BOOTP/DHCP cookie. Dropping
Explanation: Received a packet with an incorrect BOOTP/DHCP cookie.
Firewall Action: drop
Recommended Action: Investigate what client implementation is being used.
Revision: 1
Context Parameters: Packet Buffer

2.16.5. maximum_ppm_for_relayer_reached (ID: 00800005)

Default Severity: WARNING
Log Message: The maximum packets-per-minute limit have been reached. Requests will be denied for a period of time
Explanation: The maximum DHCP packets-per-minute limit for the relayer have been reached.
Firewall Action: None
Recommended Action: Verify packets-per-minute limit.
Revision: 1
Context Parameters: Packet Buffer

2.16.6. relayer_resuming (ID: 00800006)

Default Severity: NOTICE
Log Message: The relayer is now resuming, <packets_dropped> packets were dropped while the relayer was inactive
Explanation: The relayer is now resuming its duties since being temporary halted by the packets-per-minute limit.
Firewall Action: None
Recommended Action: None
Revision: 1
Parameters: packets_dropped
Context Parameters: Packet Buffer

2.16.7. hop_limit_exceeded (ID: 00800007)

Default Severity: WARNING
Log Message: Hop limit exceeded. Dropping
Explanation: The maxmimum hop limit for the DHCP packet have been reached.
Firewall Action: None
Recommended Action: Verify maximum-hop-limit setting.
Revision: 1
Context Parameters: Packet Buffer

2.16.8. client_release (ID: 00800008)

Default Severity: WARNING
Log Message: Client <client_ip> requested release. Relay canceled
Explanation: A client requested that lease should be canceled.
Firewall Action: relay_canceled
Recommended Action: None
Revision: 1
Parameters: client_ip
Context Parameters: Packet Buffer

2.16.9. got_reply_without_transaction_state (ID: 00800009)

Default Severity: WARNING
Log Message: Got server reply without transaction state for client <client_hw>. Dropping
Explanation: Received a server reply without a matching transaction state.
Firewall Action: drop
Recommended Action: Check the network environment for errors.
Revision: 1
Parameters: client_hw
Context Parameters: Packet Buffer

2.16.10. maximum_dhcp_client_relay_routes_reached (ID: 00800010)

Default Severity: WARNING
Log Message: The limit for concurrent DHCP relay routes have been reached. Dropping
Explanation: The DHCP relay routes limit have been reached.
Firewall Action: drop
Recommended Action: Verify 'Max Concurrent Relays' settings.
Revision: 1
Context Parameters: Rule Name

2.16.11. unable_to_add_relay_route_since_out_of_memory (ID: 00800011)

Default Severity: ERROR
Log Message: Internal Error: Out of memory: Can't add DHCP relay route. Dropping
Explanation: Unable to add DHCP relay route since out of memory.
Firewall Action: drop
Recommended Action: Check firewall memory consumption.
Revision: 1
Context Parameters: Rule Name

2.16.12. ignored_relay_request (ID: 00800012)

Default Severity: WARNING
Log Message: Request ignored according to the ruleset
Explanation: A DHCP relay request was ignored according to the rules.
Firewall Action: ignore
Recommended Action: None
Revision: 1
Context Parameters: Rule Name
Packet Buffer

2.16.13. no_message_type (ID: 00800013)

Default Severity: WARNING
Log Message: No message type. Dropping
Explanation: Received DHCP packet without the required message type parameter.
Firewall Action: drop
Recommended Action: Investigate what client implementation is being used.
Revision: 1
Context Parameters: Rule Name
Packet Buffer

2.16.14. bad_inform_pkt_with_mismatching_source_ip_and_client_ip (ID: 00800014)

Default Severity: WARNING
Log Message: INFORM packet did not pass through a relayer but the packet source ip and the client ip doesnt match. Dropping
Explanation: Received non relayed INFORM DHCP packet with illegally mismatching source and client IP.
Firewall Action: drop
Recommended Action: Investigate what client implementation is being used.
Revision: 1
Context Parameters: Rule Name
Packet Buffer

2.16.15. received_relayed_inform_packet_without_client_ip (ID: 00800015)

Default Severity: WARNING
Log Message: INFORM packet passed a relayer but the client ip isnt set. Dropping
Explanation: Received relayed INFORM DHCP packet with illegally missing client IP.
Firewall Action: drop
Recommended Action: Investigate what client implementation is being used.
Revision: 1
Context Parameters: Rule Name
Packet Buffer

2.16.16. maximum_current_dhcp_relays_for_iface (ID: 00800016)

Default Severity: WARNING
Log Message: The maximum number <max_relays> of current DHCP relays for this interface have been reached. Dropping
Explanation: The maximum number of DHCP relayed through a specified interface have been reached.
Firewall Action: drop
Recommended Action: Verify max-relay-per-interface setting.
Revision: 1
Parameters: max_relays
Context Parameters: Rule Name
Packet Buffer

2.16.17. dhcp_server_is_unroutable (ID: 00800017)

Default Severity: WARNING
Log Message: BOOTP/DHCP-server at <dest_ip> is unroutable. Dropping
Explanation: Unable to find route to specified DHCP server.
Firewall Action: drop
Recommended Action: Update routing table with a route to the DHCP server.
Revision: 1
Parameters: dest_ip
Context Parameters: Rule Name
Packet Buffer

2.16.18. unable_to_get_free_transaction_state (ID: 00800018)

Default Severity: WARNING
Log Message: Unable to get free transaction state for client <client_hw>. Dropping
Explanation: Unable to get a free transaction state to handle client request.
Firewall Action: drop
Recommended Action: Verify max-transaction-count setting.
Revision: 1
Parameters: client_hw
Context Parameters: Rule Name
Packet Buffer

2.16.19. invalid_gateway (ID: 00800019)

Default Severity: WARNING
Log Message: Received request with invalid gateway (<gateway_ip>). Dropping
Explanation: Received DHCP request with an invalid gateway.
Firewall Action: drop
Recommended Action: Investigate what client implementation is being used.
Revision: 1
Parameters: gateway_ip
Context Parameters: Rule Name
Packet Buffer

2.16.20. relayed_request (ID: 00800020)

Default Severity: NOTICE
Log Message: Relayed DHCP-request <type> from client <client_hw> to <dest_ip>
Explanation: Relayed a DHCP request.
Firewall Action: None
Recommended Action: None
Revision: 1
Parameters: type
client_hw
dest_ip
Context Parameters: Rule Name
Packet Buffer

2.16.21. relayed_request (ID: 00800021)

Default Severity: NOTICE
Log Message: Relayed BOOTP-request from client <client_hw> to <dest_ip>
Explanation: Relayed a BOOTP request.
Firewall Action: None
Recommended Action: None
Revision: 1
Parameters: client_hw
dest_ip
Context Parameters: Rule Name
Packet Buffer

2.16.22. got_reply_on_a_non_security_equivalent_interface (ID: 00800022)

Default Severity: WARNING
Log Message: Received reply for client <client_hw> on a non security equivalent interface. Dropping
Explanation: Received a reply for a client on a non security equivalent interface.
Firewall Action: drop
Recommended Action: Verify security-equivalent-interface setting.
Revision: 1
Parameters: client_hw
Context Parameters: Rule Name
Packet Buffer

2.16.23. assigned_ip_not_allowed (ID: 00800023)

Default Severity: WARNING
Log Message: DHCP/BOOTP-Server <server_ip> gave out an IP <ip> which isn't accepted. Dropping
Explanation: Received a lease with an IP which is not accepted according to the rules.
Firewall Action: drop
Recommended Action: Verify allowed-lease-addresses setting.
Revision: 1
Parameters: iface
server_ip
ip
Context Parameters: Rule Name
Packet Buffer

2.16.24. illegal_client_ip_assignment (ID: 00800024)

Default Severity: WARNING
Log Message: DHCP/BOOTP-Server <server_ip> tried to assign a client with an illegal IP <ip>. Dropping
Explanation: Received a lease with an illegal client assignment IP.
Firewall Action: drop
Recommended Action: Check DHCP server configuration.
Revision: 1
Parameters: server_ip
ip
Context Parameters: Rule Name
Packet Buffer

2.16.25. ambiguous_host_route (ID: 00800025)

Default Severity: WARNING
Log Message: A host route for <dest_ip> already exists which points to another interface. Dropping
Explanation: An ambiguous host route indicating another interface was detected trying to setup a dynamic hostroute for a client.
Firewall Action: drop
Recommended Action: Review previous configured host route for client.
Revision: 1
Parameters: dest_ip
Context Parameters: Rule Name
Packet Buffer

2.16.26. relayed_dhcp_reply (ID: 00800026)

Default Severity: NOTICE
Log Message: Relayed DHCP-reply <type> to client <client_hw>
Explanation: Relayed DHCP reply to client.
Firewall Action: None
Recommended Action: None
Revision: 1
Parameters: type
client_hw
Context Parameters: Rule Name
Packet Buffer

2.16.27. relayed_bootp_reply (ID: 00800027)

Default Severity: NOTICE
Log Message: Relayed BOOTP-reply to client <client_hw>
Explanation: Relayed BOOTP reply to client.
Firewall Action: None
Recommended Action: None
Revision: 1
Parameters: client_hw
Context Parameters: Rule Name
Packet Buffer

2.16.28. relayed_dhcp_reply (ID: 00800028)

Default Severity: NOTICE
Log Message: Relayed DHCP-reply <type> to gateway <gateway_ip>
Explanation: Relayed DHCP reply to a gateway.
Firewall Action: None
Recommended Action: None
Revision: 1
Parameters: type
gateway_ip
Context Parameters: Rule Name
Packet Buffer

2.16.29. relayed_bootp_reply (ID: 00800029)

Default Severity: NOTICE
Log Message: Relayed BOOTP-reply to gateway <gateway_ip>
Explanation: Relayed BOOTP reply to a gateway.
Firewall Action: None
Recommended Action: None
Revision: 1
Parameters: gateway_ip
Context Parameters: Rule Name
Packet Buffer

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