From: Steven van Jaarsveld (Steven.vanJaarsveld@btgroup.co.za)
Date: Thu Apr 19 2007 - 17:12:45 ART
Hi Guys
The passive interface does not advertise it's subnet out The router
advertises the subnet out of the interfaces that are not configured as
passive. The passive interface will still receive routing updates and
process them normally.
It will just not send any updates out.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
graham@cisco-engineer.com
Sent: 19 April 2007 09:47 PM
To: 'Vince Mashburn'
Cc: ccielab@groupstudy.com
Subject: RE: Passive-Interface Command (EIGRP)
Vince Agreed, but I will re-run the test and include the IP protocol 88
capture
For all apologies links sent earlier didn't work posted again. Second
link
makes the suggestion advertisements are sent
www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_r/rt
e_pi
h.htm#wp1124419
www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_r/rt
e_pi
h.htm#wp1124419
_____
From: Vince Mashburn [mailto:cciegroupstudy@gmail.com]
Sent: 19 April 2007 20:40
To: graham@cisco-engineer.com
Cc: ccielab@groupstudy.com
Subject: Re: Passive-Interface Command (EIGRP)
I don't see how it could still advertise routes since neighbor
relationships
won't be formed with passive interface configured. EIGRP cannot
advertise
routes to devices that it does not have neighbor adjacencies to.
On 4/19/07, graham@cisco-engineer.com <graham@cisco-engineer.com
<mailto:graham@cisco-engineer.com> > wrote:
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/h
irp_
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/h
irp_
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
This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:36 ART