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New Member

DHCP Relay Agent

A question about the Configuring a Relay Agent on Cisco

What Protocols I need - are these Protocols all avaliable for the DHCP Relay Agent

> * Trivial File Transfer Protocol (TFTP) (port 69)

> * DNS (port 53), time service (port 37)

> * NetBIOS name server (port 137)

> * NetBIOS datagram server (port 138)

> * Boot Protocol (DHCP/BootP) client and server datagrams (ports 67

> and 68)

> * Terminal Access Control Access Control System (TACACS) service

> (port 49)

> * IEN-116 name service (port 42)

>

Thank for Information please wirte back soon

Daniel Hoffmann

1 REPLY
New Member

Re: DHCP Relay Agent

when you define an ip helper-address forwarding of eight default udp ports are enabled automatically. (TFTP 69,DNS53,Time37,NetBIOS name service port137, NetBIOS datagram service port 138, BOOTP server port 67,BOOTP client port 68, and TACACS port 49.

You can add the IEN-116 port with the

IP forward-protocol udp 42 command.

http://www.cisco.com/univercd/cc/td/doc/product/voice/ics7750/tblshoot/tstcp.htm

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