From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Tue May 04 2004 - 13:48:19 GMT-3
Devi,
Yes this is true if the interface is point-to-point as layer 2
to layer 3 resolution is not required. Dialer interfaces and the main
interface configured with the dialer string command (in conjunction with
PPP) are point-to-point interfaces, and do not require resolution. Main
interfaces and dialer interfaces configured in a rotary group are
multipoint interfaces, and do require resolution.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Devi Mallampalli
> Sent: Tuesday, May 04, 2004 6:30 AM
> To: Brian McGahan; Kenneth Wygand; ccielab@groupstudy.com
> Subject: RE: What is the best way to become ISDN smart
>
> Hi Brian/ Ken ,
>
> I think you do NOT need "dialer-map" in order to make "dialer-watch"
to
> work. So it works on both Legacy DDR as well as Dialer profiles.
>
> The other day , we have tested positively the below Dialer watch
config
> on a Dialer interface where I am not using any dialer maps. As you can
> note I am watching 3 routes ( on Data , Voice and Management vlan) ,
if
> she looses any of them Dialer watch fires the Dialer interface as she
is
> aware where to call ( with string) and whom to call ( dialer remote
name
> ).
>
> And it works 10 out 10 times.
>
> interface Serial1/0:15
> description *** OnRamp30 Service # A039322-3400 K1001 ***
> no ip address
> encapsulation ppp
> dialer pool-member 1
> isdn switch-type primary-net5
> no fair-queue
> no cdp enable
>
> interface Dialer1
> bandwidth 2048
> ip unnumbered Loopback2
> ip pim sparse-mode
> service-policy output WAN-EDGE
> encapsulation ppp
> dialer pool 1
> dialer remote-name au200r02-backup
> dialer idle-timeout 10
> dialer watch-disable 180
> dialer string 0297974600
> dialer watch-group 3
> dialer watch-group 2
> dialer watch-group 1
> ppp authentication chap
> ppp chap hostname au300r02-backup
> ppp multilink
> ppp multilink fragment-delay 10
> multilink min-links 29
>
> dialer-list 1 protocol ip permit
>
> dialer watch-list 1 ip 10.0.250.1 255.255.255.255
> dialer watch-list 1 delay route-check initial 120
> dialer watch-list 2 ip 10.22.2.254 255.255.255.255
> dialer watch-list 2 delay route-check initial 120
> dialer watch-list 3 ip 10.18.2.0 255.255.255.240
> dialer watch-list 3 delay route-check initial 120
>
>
> Regards
>
> Devi.
>
>
> -----Original Message-----
> From: Brian McGahan [mailto:bmcgahan@internetworkexpert.com]
> Sent: Tuesday, 4 May 2004 12:18 PM
> To: Kenneth Wygand; ccielab@groupstudy.com
> Subject: RE: What is the best way to become ISDN smart
>
>
> Ken,
>
> In short, yes it is required.
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987 x 705
> Outside US: 775-826-4344 x 705
>
>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > Kenneth Wygand
> > Sent: Sunday, May 02, 2004 6:10 AM
> > To: Kian Wah Lai; MMoniz; ccie2be; CCIE Canidate;
> ccielab@groupstudy.com;
> > bmcgahan@internetworkexpert.com
> > Subject: RE: What is the best way to become ISDN smart
> >
> > Hey Brian and group,
> >
> > Do you know if the "dialer map" is still required for the network
> being
> > watched through Dialer Watch? According to Kian's tests, it is not
> > required and Cisco doesn't list it as a configuration requirement.
> > However, they do illustrate its use and purpose in their
configuration
>
> > example at the bottom of the same link:
> >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
> fd
> > ia
> >
>
<http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr
> /f
> > dia>
> > l_c/fnsprt6/dcdbakdw.htm#19111
> >
> > Thanks in advance,
> > Ken
> >
> > -----Original Message-----
> > From: Kian Wah Lai [mailto:kian_wah@qala.com.sg]
> > Sent: Sun 5/2/2004 2:39 AM
> > To: Kenneth Wygand; 'MMoniz'; 'ccie2be'; 'CCIE Canidate';
> > ccielab@groupstudy.com
> > Cc:
> > 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/ios122/122c
> > gcr/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
> > >
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> >
> >
> >
> >
> ____________________________________________________________________
> > ___
> > Please help support GroupStudy by purchasing
> your
> > study
> > materials
> > from:
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> >
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> >
> >
> >
> >
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> > ___
> > Please help support GroupStudy by purchasing
> your
> > study
> > materials
> > from:
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> >
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> >
> >
> >
> >
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> > study
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> >
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> >
>
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