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New Member

OSPF and EIGRP

just wanna know which layer4 protocol ospf and eigrp uses??? and whats the port no....like BGP is TCP based and uses port 179.....so just wanna curious abt ospf and eigrp and if u could tell me abt rip and igrp as well that will make my doubts really clear........cheers and thanks in advance

4 REPLIES
Cisco Employee

Re: OSPF and EIGRP

OSPF uses IP protocol number 89 and EIGRP uses 88. RIP is UDP based and uses port 520. IGRP uses IP protocol number 9.

To find out about the assigned IP protocol numbers, please refer to the following document:

http://www.iana.org/assignments/protocol-numbers

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México 
Paseo de la Reforma 222 Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
New Member

Re: OSPF and EIGRP

Does RIP v2 works as application like BGP ( working on top of TCP) ?

Re: OSPF and EIGRP

RIP v2 is like v1 on top of UDP unlike BGP which is on TCP.

Regards,

Wilson Samuel

Re: OSPF and EIGRP

OSPF, EIGRP and IGRP are Directly encapsulated in the IP packet. They just add their headers and hence rely on all the properties of the IP datagram.

OSPF - IP datagram 89

EIGRP - IP datagra 88

IGRP - IP datagram 9

RIP uses UDP 520

HTH

Narayan

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