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DHCP ARP inspection does not allow to register new clients on DHCP. Disconnects clients.

Following configuration: HOST - > Acces Switch EX2300 version 18.1R3.3 set vlans USERS-26 vlan-id 26 set vlans USERS-26 forwarding-options dhcp-security arp-inspection set vlans USERS-26 forwarding-options dhcp-security group TRUST-DHCP overrides trusted set vlans USERS-26 forwarding-options dhcp-security group TRUST-DHCP interface ae0.0 -> Core Switch EX4600: JUNOS 14.1X53-D27.3 built 2015-06-17 set forwarding-options dhcp-relay forward-snooped-clients all-interfaces set forwarding-options dhcp-relay overrides allow-snooped-clients set forwarding-options dhcp-relay overrides bootp-support set forwarding-options dhcp-relay overrides delete-binding-on-renegotiation set forwarding-options dhcp-relay server-group DHCP-RELAY-GROUP 192.168.22.6 set forwarding-options dhcp-relay server-group DHCP-RELAY-GROUP 192.168.22.5 set forwarding-options dhcp-relay active-server-group DHCP-RELAY-GROUP set forwarding-options dhcp-relay group DHCP-RELAY-GROUP interface irb.25 set forwarding-options dhcp-relay group DHCP-RELAY-GROUP interface irb.26 -> EX2300 -> DHCP-server Help please in what a problem of shutdown of clients?


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RE: DHCP Relay on EX3400

Example below: jh@fw# show forwarding-options dhcp-relay ( server-group ( dhcp-server ( 1.2.3.4; ) ) active-server-group dhcp-server; group dhcp-server ( interface irb.10; interface irb.20; ) ) jh@fw# show forwarding-options | display set set forwarding-options dhcp-relay server-group dhcp-server 1.2.3.4 set forwarding-options dhcp-relay active-server-group dhcp-server set forwarding-options dhcp-relay group dhcp-server interface irb.10 set forwarding-options dhcp-relay group dhcp-server interface irb.20 #DHCPRelay #ex3400


Discussion Post
Why DHCP relay packets dropped?

Please tell me who faced this problem below in log dhcp logfile on Juniper EX4600 , periodically there is such an error in the dhcp relay service: [ERROR] jdhcpd security packet handle: Interface >ae1.0< packet flags:201 And this packet drop > show dhcp relay statistics Packets dropped: Total 5488 Bootp packets 2 Interface not configured 2751 Send error 2730 No binding found 5 Apr 12 14:34:16.523523 [INFO] [default:default][RLY][INET][irb.26][SID=100] JDHCPD CLIENT EVENT: Client(0x8e18c00) got event CLIENT EVENT ACK PDU in state RELAY STATE BOUND Apr 12 14:34:16.523545 Unexpected ACK received in RELAY STATE BOUND, relaying (could be inform-ack) Apr 12 14:34:16.523557 [ERROR] jdhcpd security packet handle: Interface >ae1.0< packet flags:201 Apr 12 14:34:16.523569 [INFO] jdhcpd security packet handle: security-packet-handle input bd USERS-26 Apr 12 14:34:16.523579 security-packet-handle default/default-switch/USERS-26 dhcp-security not configured Apr 12 14:34:16.523594 [INFO] [default:default][RLY][INET][irb.26][SID=100] jdhcpd packet relay: *** relaying packet *** Apr 12 14:34:16.523608 [INFO] [default:default][RLY][INET][irb.26][SID=100] jdhcpd packet relay: Broadcast response for 0.0.0.0 Apr 12 14:34:16.523751 [INFO] [default:default][RLY][INET][irb.26] jdhcpd io send packet: DHCP PDU from 10.193.18.1 to 255.255.255.255 port 68 out interface 554 len 300 Apr 12 14:34:47.536371 [INFO] jdhcpd io l2ng pfe reader: jdhcpd pfe pkt hdr t: len 141946028 L3ifindex = 328, L2ifindex = 553, dpi rtbl=564 Apr 12 14:34:47.536417 [INFO] [irb.25] jdhcpd io get ifs: The L3 interface is 553 and L2 interface is 564, using the L3 interface Apr 12 14:34:47.536440 [INFO] [default:default][RLY][INET][irb.25] jdhcpd io pfe packet: LOCAL : recv sa 10.193.0.71 da 255.255.255.255, src port 68, dst port 67 if name irb.25 len 300 Apr 12 14:34:47.536456 [ERROR] jdhcpd security packet handle: Interface >ae4.0< packet flags:200 Apr 12 14:34:47.536467 security-packet-handle sus l2:ae4.0 Apr 12 14:34:47.536478 [INFO] jdhcpd security packet handle: security-packet-handle sus l3:irb.25 Apr 12 14:34:47.536490 [INFO] jdhcpd security packet handle: security-packet-handle input bd USERS-25 Apr 12 14:34:47.536649 security-packet-handle default/default-switch/USERS-25 dhcp-security not configured My dhcp-relay configuration: set forwarding-options dhcp-relay forward-snooped-clients all-interfaces set forwarding-options dhcp-relay overrides allow-snooped-clients set forwarding-options dhcp-relay overrides always-write-giaddr set forwarding-options dhcp-relay overrides bootp-support set forwarding-options dhcp-relay overrides send-release-on-delete set forwarding-options dhcp-relay overrides delete-binding-on-renegotiation Why do such errors occur in the dhcp server log?



Discussion Thread 9
SRX multiple DHCP relay configurations

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RE: SRX multiple DHCP relay configurations

They told me that DHCP (relay, server and client) is not supported when running a chassis cluster


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QFX5100 and DHCP snooping

Possible completions: client Show DHCP client information relay Show DHCP relay information server Show DHCP server information statistics Show DHCP service statistics (master:0)[edit] am# set et ^ syntax error


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SRX340 DHCP and Cisco WLC relay - No network access to clients

Any one who is using Cisco WLC as DHCP relay for SRX340 DHCP server?