Shibu Nair wrote:
If the interface configured as passive under OSPF routing
protocol,
will there be any neighbor relationship establish on that
interface ?
No. Passive interface means it doesn't send Hellos, which it would need to
do to establish a neighbor relationship.
Priscilla
It depends, if you are using backup interfaces then EIGRP won't bring the
line up obviously.
I suspect that you are using floating statics though, in which case, if you
just specify passive interface then no adjacency will be formed regardless
of the state of the interface. If you then specify
in which case, if
you
just specify passive interface then no adjacency will be formed regardless
of the state of the interface. If you then specify a neighbor so it is
unicast, it will bring the line up (an keep it up) if it is defined as
interesting traffic. If it isn't seen as int
interface to
potentially provide cover for multiple pvc's.
S.
-Original Message-
From: james kang [mailto:[EMAIL PROTECTED]]
Sent: Monday, 2 September 2002 7:14 AM
To: [EMAIL PROTECTED]
Subject: Re: EIGRP passive-interface [7:52453]
Jon,
thanks a lot. your explanation is very clear.
best
hi, anyone
I am preparing the CCIE lab. there r one question about eigrp on BRI.
i am using bri to backup frame relay connection. to prevent the eigrp from
bring up the isdn line, i prefer the command passive-interface than filter
list.
but i am wondering whether the router can form the eigrp
Thank you for all your input. This has helped me
a great deal.
David
- Original Message -
From: Louie Belt
To: CCIEn2002
Sent: Wednesday, January 02, 2002 2:53 PM
Subject: RE: Passive Interface Help [7:30648]
A passive interface prevents a routing protocol from advertising its
network
12.0.0.0 to be advertised, remove the network 12.0.0.0 statement or use
distribute-list to filter out the route.
Regards,
cheekin
- Original Message -
From:
To:
Sent: Wednesday, January 02, 2002 15:03
Subject: Passive Interface Help [7:30648]
Happy New Year!!
I need a little
The passive-interface command stops routing updates from exiting that
interface or--in the case of EIGRP, OSPF, and IS-IS--it stop hello
packets from exiting which keeps neighbor relationships from forming.
This command won't keep a connected network from showing up in your
routing table
Thank you for the info. Now I am a little confused still on
the passive interface. If it prevents routing updates
from being sent out, why would one want a
passive interface. From my understanding, a
passive interface would not advertise is routing
updates to its neighbor. If that is the case, I
]">news:[EMAIL PROTECTED]...
Thank you for the info. Now I am a little confused still on
the passive interface. If it prevents routing updates
from being sent out, why would one want a
passive interface. From my understanding, a
passive interface would not advertise is routing
update
As I mentioned in my first reply, the passive-interface command
operates a little differently depending on the protocol you're
using. For protocols that need to establish neighbors--such as
EIGRP, OSPF, and IS-IS--this command stops those relationships
from forming so no routes will ever
Are these routers directly connected? If so, that
explains why you would still be able to ping. Did you
try to use loopback interfaces and see if those routes
are being announced?
ms
--- CCIEn2002 wrote:
Thank you for the info. Now I am a little confused
still on
the passive interface
protocol advertising should occur.
All of the examples surrounding the passive-interface default command (
available in IOS 12.0 and higher ) that I have seen on CCO specifically
reference ISP requirements.
Essentially, why advertise internal routes and updates out every dial up and
DSL
as passive ( for the
ISP IGP ) and will then specifically activate interfaces where route and
routing protocol advertising should occur.
All of the examples surrounding the passive-interface default command (
available in IOS 12.0 and higher ) that I have seen on CCO specifically
reference ISP
Kludge!!! I'd rather refer to these features as job security :-)
Dave
Priscilla Oppenheimer wrote:
For that matter, why advertise routes on any leaf network that only has
end nodes? In the IP world, most end nodes (workstations) don't care about
routing updates. (It could be argued that
Dave,
If you want job security, become a tenured professor. Low pay but lots
of security! :)
Prof. Tom Lisa, CCAI
Community College of Southern Nevada
Cisco Regional Networking Academy
MADMAN wrote:
Kludge!!! I'd rather refer to these features as job security :-)
Dave
Priscilla
Happy New Year!!
I need a little help on what a passive
interface is. From what I can gather, a passive
interface does not advertise its route to its
neighbor ? Now if that is the case, why can
I still ping an interface that is set to passive.
Please note: This is excluding directly connected
.
-
I tested it by myself, Yes, it is true when you believe what the
debugger says, "debug ip packet" reports it's sending hellos on a
passive interface, But on the other end, the same "debug ip packet"
says no hellos from t
---
I tested it by myself, Yes, it is true when you believe what the
debugger says, "debug ip packet" reports it's sending hellos on a
passive interface, But on the other end, the same "debug ip packet"
says no hellos from the passive interface are received.
So what's going on
was wondering...as Cisco says...passive interface is there to block routing
updates from going across.
Hello packets do not contain routing updates...they are a mechanism of
keeping a router connected and alive in the OSPF n/w
Deepak Ravindra
CCNA,ACRC...
"Dave" [EMAIL PROTEC
yes, but there is no reason for OSPF routers to know about each other unless
they are going to exchange topology databases. Look it up in Cisco
Documentation, Hello's will not be passed on a passive-interface.
--
Dave
CCNP/CCDP/CCAI
""Deepak Ravindra"" [EMAIL PROTECTED] wro
Will the passive-interface command stop OSPF's hellos?
-Magnus
Magnus Thorne
eVoice, Inc.
1394 Williow Road
Menlo Park, CA 94025
Direct: 650.330.3974
Main: 650.330.3700
Fax: 650.330.3901
B7@ev-cal-ex01">news:8B5B58F220FCD311879600508B652072478AB7@ev-cal-ex01...
Will the passive-interface command stop OSPF's hellos?
-Magnus
Magnus Thorne
eVoice, Inc.
1394 Williow Road
Menlo Park, CA 94025
Direct: 650.330.3974
Main: 650
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