Passive-Interface Command (EIGRP)

From: graham@cisco-engineer.com
Date: Thu Apr 19 2007 - 16:22:18 ART


Group,

 

I am getting some conflicting info from the Doc-CD on the Passive-interface
command;

 

http://www.cisco.com/univercd
<http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_
r/rte_eih.htm#wp1000250>
/cc/td/doc/product/software/ios124/124cr/hirp_r/rte_eih.htm#wp1000250

 

The link above states

 

Configuring the passive-interface command suppresses all incoming and
outgoing routing updates and hello messages. EIGRP neighbor adjacencies
cannot be established or maintained over an interface that is configured as
passive. "

 

Yet this link;

 

http://www.cisco.com/univercd
<http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_
r/rte_pih.htm#wp1124419>
/cc/td/doc/product/software/ios124/124cr/hirp_r/rte_pih.htm#wp1124419

 

"Enhanced Interior Gateway Routing Protocol (EIGRP) is disabled on an
interface that is configured as passive although it advertises the route. "

 

Perhaps its me being silly, I always believed the first quote was correct
for EIGRP, and looking at Debugs on a network would make it true, but then I
decided to hub and "ethereal/wireshark" the packets outgoing and saw IP
protocol 88 being sent (EIGRP)

 

Does someone have an authoritative answer on this one?

 

 

Thanks

 

Graham



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