From: William Chen (kwchen@netvigator.com)
Date: Sun May 02 2004 - 13:16:14 GMT-3
Good, that is what I believe. :-)
- William Chen
----- Original Message -----
From: "Kian Wah Lai" <kian_wah@qala.com.sg>
To: "'William Chen'" <kwchen@netvigator.com>; "'Kenneth Wygand'"
<KWygand@customonline.com>; "'MMoniz'" <ccie2002@tampabay.rr.com>;
"'ccie2be'" <ccie2be@nyc.rr.com>; "'CCIE Canidate'"
<cisco@heartofdarknessstudios.com>; <ccielab@groupstudy.com>
Sent: Sunday, May 02, 2004 10:52 PM
Subject: RE: What is the best way to become ISDN smart
> Hi,
>
> I checked the show dialer and it stated it dialed due to OSPF. I removed
the
> network statement in OSPF for ISDN and shut e0/0 down. This time it did
not
> dial.
>
> I then use dialer map to map the network that I'm watching and shut down
> e0/0 again. This time it dials and reason is due to dialer watch-list.
'Dial
> reason: Dialing on watched route loss' However, the route I'm watching
does
> not reappear in the routing table. Guess is due to no routing protocols
> running over ISDN.
>
> So, the dialer map statement is actually needed :)
>
> Regards,
> Kian Wah Lai
>
> -----Original Message-----
> From: William Chen [mailto:kwchen@netvigator.com]
> Sent: Sunday, May 02, 2004 9:16 PM
> To: Kian Wah Lai; 'Kenneth Wygand'; 'MMoniz'; 'ccie2be'; 'CCIE Canidate';
> ccielab@groupstudy.com
> Subject: Re: What is the best way to become ISDN smart
>
> Hi,
>
> According to the configuration, I seems to me that you also run OSPF in
> the ISDN interfaces. If the Ethernet interface is down, OSPF packets will
be
> triggered to send thru the ISDN interface, and if OSPF is included as
> interesting, OSPF maybe the reason that triggers the call. Run the "show
> dialer" to check the reason of dialing, it maybe not be casued by the
dialer
> watch.
>
> Besides enough practice, I really suggest to read the chapters in DocCD
> about ISDN and DDR, read it carefully, word by word. It is the best way to
> become ISDN smart.
>
> Best Regards,
> William Chen
>
> ----- Original Message -----
> From: "Kian Wah Lai" <kian_wah@qala.com.sg>
> To: "'Kenneth Wygand'" <KWygand@customonline.com>; "'MMoniz'"
> <ccie2002@tampabay.rr.com>; "'ccie2be'" <ccie2be@nyc.rr.com>; "'CCIE
> Canidate'" <cisco@heartofdarknessstudios.com>; <ccielab@groupstudy.com>
> Sent: Sunday, May 02, 2004 2:39 PM
> Subject: RE: What is the best way to become ISDN smart
>
>
> > I tested it just now and here is what I've found
> > R1 connected to R2 via Ethernet and ISDN. R1 is having a loop back int
> which
> > I'll use it for dialer watch-list. The routers that I've used are the
one
> > with the real ISDN line. I didn't manage to try the one on PEC, think
> there
> > are some problems with the simulator (can't even dial through)
> >
> >
> > R1:
> > interface BRI0/0
> > ip address 172.16.1.1 255.255.255.0
> > encapsulation ppp
> > ip ospf demand-circuit
> > dialer map ip 172.16.1.2 broadcast <num>
> > dialer load-threshold 255 either
> > dialer-group 1
> > isdn switch-type basic-net3
> > no peer neighbor-route
> > end
> >
> > R2:
> > interface BRI0/0
> > ip address 172.16.1.2 255.255.255.0
> > encapsulation ppp
> > dialer watch-disable 10
> > dialer map ip 172.16.1.1 broadcast <num>
> > dialer watch-group 1
> > dialer-group 1
> > isdn switch-type basic-net3
> > no peer neighbor-route
> > end
> >
> > r2(config)#int e0/0
> > r2(config-if)#shut
> > r2(config-if)#
> > 01:38:54: %OSPF-5-ADJCHG: Process 1, Nbr 10.10.10.10 on Ethernet0/0 from
> > FULL to DOWN, Neighbor Down: Interface down or detached
> > 01:38:54: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0, TEI 110 changed
> to
> > up
> > 01:38:55: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to up
> > 01:38:56: %LINK-5-CHANGED: Interface Ethernet0/0, changed state to
> > administratively down
> > 01:38:56: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:1,
> changed
> > state to up
> > 01:38:57: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0,
> > changed state to down
> > 01:39:00: %LINK-3-UPDOWN: Interface BRI0/0:2, changed state to up
> > 01:39:01: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:2,
> changed
> > state to up
> > 01:39:01: %ISDN-6-CONNECT: Interface BRI0/0:1 is now connected to <num>
> > 01:39:06: %ISDN-6-CONNECT: Interface BRI0/0:2 is now connected to
unknown
> >
> > Thus, there is no need for dialer map statement. I tried putting it in
and
> > it still works the same way.
> >
> > Regards,
> > Kian Wah Lai
> >
> >
> >
> > -----Original Message-----
> > From: Kenneth Wygand [mailto:KWygand@customonline.com]
> > Sent: Sunday, May 02, 2004 11:36 AM
> > To: Kian Wah Lai; MMoniz; ccie2be; CCIE Canidate; ccielab@groupstudy.com
> > Subject: RE: What is the best way to become ISDN smart
> >
> > Kian,
> >
> > A few things:
> >
> > 1) Yes, it is possible to bring up both channels through a single dial
> > number. This is done through PPP Multilink and can only be done with
PPP
> > encapsulation (like you are using). You just need to add the command
"PPP
> > Multilink". Then you need to tell it _when_ you want the second channel
> to
> > kick up. This can be load-based (ppp multilink load-threshold [1-255]),
> or
> > automatic (ppp multilink links minimum 2). The reason this appears to
> work
> > with the "real" circuit could be because the second link will come up
> > _without_ multilink in the following scenario. Picture R1 calls R2
> through
> > the first dial number. If R2 doesn't realize it can reach R1 over this
> > link, it may use the second dial number to call R1 back. You will see
> this
> > if you "show isdn history". Check the direction (inbound or outbound)
for
> > each circuit connection (which router initiated the call).
> >
> > 2) The way you have this connection set up, R1 can never dial R2 for two
> > reasons. The first reason is because there is no dial string associated
> > with the dialer map. This is correct if you do not want R1 to ever dial
> R2.
> > However, you also do not have any interesting traffic defined.
> Interesting
> > traffic is used to reset the "idle-timeout" which, when expires, tears
> down
> > the connection. There is an "idle-timeout" on each side of the
circuit -
> in
> > your case, there is an idle-timeout on both R1 and R2. When _either_ of
> > these values on either side reaches 0, the circuit is torn down, period.
> R1
> > does not care what R2's idle-timeout value is - if R1's idle-timeout
> reaches
> > 0, it will tear the circuit down. Since you have not explicitly defined
> the
> > idle-timeout value, the default is 120 seconds. Anytime interesting
> traffic
> > is seen crossing the link, this value is reset to the configured value
> (the
> > default of 120 seconds in this case). However, you do not have any
> > interesting traffic defined through the configuration of a "dialer-group
> x"
> > interface command and associated "dialer-list x" global command. You
can
> > either A) define interesting traffic across this link, B) set the
> > idle-timeout value to a very high value like 9999 (I don't like this),
or
> C)
> > disable the idle-timeout value on router A through the command "no
dialer
> > idle-timeout". My preference is choice C if you want Router B to make
all
> > the dialing and teardown decisions.
> >
> > 3) You are using dialer watch. For whichever route you are watching,
you
> > must have an associated "dialer-map" mapping to that network. Even
though
> > this is not listed as a required task in the Dialer Watch configuration
> task
> > list on the documentation CD, you will see it referenced in the notes
> within
> > the configuration examples:
> >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fdia
> > l_c/fnsprt6/dcdbakdw.htm#19111
> >
> > HTH,
> > Ken
> >
> > -----Original Message-----
> > From: Kian Wah Lai [mailto:kian_wah@qala.com.sg]
> > Sent: Sat 5/1/2004 10:48 PM
> > To: Kenneth Wygand; 'MMoniz'; 'ccie2be'; 'CCIE Canidate';
> > ccielab@groupstudy.com
> > Cc:
> > Subject: RE: What is the best way to become ISDN smart
> >
> >
> >
> > R1 - ISDN - R2, only r2 can call r1
> > This config works with a real ISDN line, but can't work on the ISDN
> > simulator on PEC. Another thing with PEC ISDN is that I only get to
> > bring up
> > the 1st channel. For basic-net3 (both labs are using this), no SPID
> > are
> > required and my friend told me one number will bring up both
> > channel.
> >
> > R1:
> > interface BRI0/0
> > ip address 172.16.12.1 255.255.255.0
> > encapsulation ppp
> > dialer map ip 172.16.12.2 name r2 broadcast
> > isdn switch-type basic-net3
> > no peer neighbor-route
> > ppp authentication chap
> > end
> >
> > R2:
> > interface BRI0/0
> > ip address 172.16.12.2 255.255.255.0
> > encapsulation ppp
> > dialer map ip 172.16.12.1 name r1 broadcast <num>
> > dialer watch-group 1
> > dialer-group 1
> > isdn switch-type basic-net3
> > no peer neighbor-route
> > ppp authentication chap
> > end
> >
> > Regards,
> > Kian Wah Lai
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > Of
> > Kenneth Wygand
> > Sent: Sunday, May 02, 2004 10:32 AM
> > To: Kian Wah Lai; MMoniz; ccie2be; CCIE Canidate;
> > ccielab@groupstudy.com
> > Subject: RE: What is the best way to become ISDN smart
> >
> > Kian,
> >
> > Can you post your configurations and describe the problem you are
> > having?
> > Maybe we can help you! :)
> >
> > Ken
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com on behalf of Kian Wah Lai
> > Sent: Sat 5/1/2004 9:11 PM
> > To: 'MMoniz'; 'ccie2be'; 'CCIE Canidate';
> > ccielab@groupstudy.com
> > Cc:
> > Subject: RE: What is the best way to become ISDN smart
> >
> >
> >
> > One thing I'm curious about, I keep having problem with ISDN
> > simulator :(
> > However, when I copy the same config to a router with real
> > ISDN
> > line, it
> > works perfectly fine.
> >
> > Regards,
> > Kian Wah Lai
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]
> > On Behalf
> > Of
> > MMoniz
> > Sent: Sunday, May 02, 2004 3:53 AM
> > To: ccie2be; CCIE Canidate; ccielab@groupstudy.com
> > Subject: RE: What is the best way to become ISDN smart
> >
> > Well another alternative is to become a gold member or other
> > level
> > with
> > IPExpert and you will have access to NUMEROUS escenarios
> > that will
> > not only
> > give you explanations but also the configs if you so choose
> > to look
> > at. All
> > of them are
> > CCIE level but they also have CCNA and NP level.
> >
> > This is inlcuded if you take like the VCLass or any other
> > class I
> > believe
> > and it makes picking labs to do very simple.
> >
> > For instance if I only want to go over ISDN they have a few
> > labs
> > that are
> > just ISDN but also many other complex routing labs that
> > include
> > ISDN.
> >
> > Not that I am suggesting that any of the other products out
> > there
> > are not
> > quality, but to me being able to access via
> > a "virtual" means is important to me. I want to be able to
> > access
> > labs no
> > matter my physical location.
> >
> > But it still all boils down to the same thing!!!learn,
> > practice
> > practice
> > practice
> >
> > just my opinion,
> >
> > mike
> >
> >
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On
> > Behalf
> > Of
> > ccie2be
> > Sent: Saturday, May 01, 2004 3:21 PM
> > To: CCIE Canidate; ccielab@groupstudy.com
> > Subject: Re: What is the best way to become ISDN smart
> >
> >
> > My suggestion would be to get your hands on a large set of
> > practice
> > labs and
> > practice the isdn portion of each one. After doing 20 to 40
> > of
> > these
> > practice labs, you'll feel fairly confident of your ability
> > to
> > handle ccie
> > level isdn config's. Of course, if there are other topics
> > you want
> > or need
> > to practice, you'll find them covered in the practice labs
> > as well.
> >
> > Lots of companies these days offer practice lab workbooks,
> > but for
> > my money,
> > I think those from Internetwork Expert are the best. They
> > include
> > with
> > their practice labs comprehensive explanations of their
> > solution at
> > no
> > additional cost whereas IPExpert offers no explanation at
> > all or
> > just a
> > superficial one at best.
> >
> > Each company I think also provides a sample lab you can
> > download for
> > free so
> > you can decide based on your assessment of their sample lab.
> >
> > good luck
> > ----- Original Message -----
> > From: "CCIE Canidate" <cisco@heartofdarknessstudios.com>
> > To: <ccielab@groupstudy.com>
> > Sent: Saturday, May 01, 2004 12:05 PM
> > Subject: What is the best way to become ISDN smart
> >
> >
> > > Hi everyone!
> > >
> > > I know that there is a way more gray matter here than at
> > my house.
> > > Basically, I have all of the right gear and can understand
> > the
> > basics,
> > > AND have already read a ton of Cisco documents, Kaslow's
> > book, the
> > CISCO
> > > Press books, among others....and still am not sure how
> > best to
> > assemble
> > > the most efficient configs required for CCIE level work.
> > I want
> > to get
> > > the opinions of group members on what materials give me
> > the "BEST"
> > > crawl, walk, run steps, procedures, and examples of how to
> > setup
> > ISDN in
> > > preparation for the lab.
> > >
> > > Thanks,
> > >
> > > ISDN challenged guy
> > >
> > >
> >
> > _______________________________________________________________________
> > > Please help support GroupStudy by purchasing your study
> > materials
> > from:
> > > http://shop.groupstudy.com
> > >
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> >
> >
> >
> > _______________________________________________________________________
> > Please help support GroupStudy by purchasing your study
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> > from:
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> >
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> >
> >
> >
> > _______________________________________________________________________
> > Please help support GroupStudy by purchasing your study
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> > from:
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> >
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> >
> >
> >
> > _______________________________________________________________________
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> > from:
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> >
> >
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> > from:
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