From: M e (iosluver@gmail.com)
Date: Mon Oct 15 2007 - 11:00:37 ART
Hi Shiran,
I had a similar issue with this task & if I recall correctly there is a
routing issue with this task as the subnet that R4 & R5 are connected on
will be in a down state since PPP is not active. My approach was to create a
Loopback interface & use IP unnumbered to tie it to the physical interface.
The other issue I had with this task, was when the IP address lease is
granted by the server & accepted by R4, it sets the Subnet mask to /30
rather than the /24 which is configured on R5 & is what the task/lab
required. I fooled around with some PPP Layer 3 negotiation parameters but
could not get R4 to accept the /24 subnet mask. You may or may not encounter
this issue though. I thought mine was a bug or a misconfiguration somewhere.
The guys at Internetworkexpert don't seem to have had this issue as the work
book doesn't mention it , so I guess it may have been an IOS specific issue.
Let me know how it turns out for you mate & hopefully one of the Brians may
add a note or 2 about this.
Cheers
On 10/15/07, shiran guez <shiranp3@gmail.com> wrote:
>
> this is scenario is like the one in Lab 13 task 2.3 with task 9.1
>
> the concept is the same the IP's and DHCP Server router number are
> different.
>
> it is not a reachablity issue, it is either something missing in the
> config
> or something missing in my understanding of how this works, as I you can
> see
> the DHCP Server responds to R5 and R5 receive the Asked information
>
> R5 is configured to relay that Address to his peer R4 and for some reason
> it
> is not happen!
>
>
>
> On 10/15/07, Joseph Saad <joseph.samir.saad@gmail.com> wrote:
> >
> > Can I have the lab number?
> >
> > On 10/15/07, shiran guez <shiranp3@gmail.com> wrote:
> > >
> > > yes
> > >
> > > On 10/15/07, Joseph Saad <joseph.samir.saad@gmail.com > wrote:
> > > >
> > > > can you ping 132.20.54.5 from R3?
> > > >
> > > >
> > > > On 10/15/07, shiran guez <shiranp3@gmail.com > wrote:
> > > > >
> > > > > R5#ping 132.20.53.3
> > > > >
> > > > > Type escape sequence to abort.
> > > > > Sending 5, 100-byte ICMP Echos to 132.20.53.3, timeout is 2
> seconds:
> > > > > !!!!!
> > > > >
> > > > > R3#sh ip rou
> > > > > R3#sh ip route 132.20.54.0
> > > > > Routing entry for 132.20.54.0/24
> > > > > Known via "ospf 1", distance 110, metric 20
> > > > > Tag 5120, type extern 2, forward metric 10
> > > > > Last update from 132.20.53.5 on Ethernet0/0, 01:41:16 ago
> > > > > Routing Descriptor Blocks:
> > > > > * 132.20.53.5, from 150.1.5.5 , 01:41:16 ago, via Ethernet0/0
> > > > > Route metric is 20, traffic share count is 1
> > > > > Route tag 5120
> > > > >
> > > > > there is no reachability issue! no need for any static routes.
> > > > >
> > > > >
> > > > >
> > > > > On 10/15/07, Joseph Saad <joseph.samir.saad@gmail.com > wrote:
> > > > > >
> > > > > > "unicasting BOOTREPLY for client cc04.11a1.0000 to relay
> > > > > > 132.20.54.5 ".
> > > > > >
> > > > > > I believe if you enable debug ip packet detail, this will show
> as
> > > > > > unroutable.
> > > > > >
> > > > > > On 10/15/07, Joseph Saad <joseph.samir.saad@gmail.com > wrote:
> > > > > > >
> > > > > > > Does R3 have reachability to the network of R4 serial
> interface?
> > > > > > >
> > > > > > > Try adding a static route on R3 for 132.20.54.x pointing out
> to
> > > > > > > R5's IP address adjacent to R3.
> > > > > > >
> > > > > > > On 10/15/07, shiran guez <shiranp3@gmail.com > wrote:
> > > > > > > >
> > > > > > > > Hi
> > > > > > > >
> > > > > > > > this is a task taken from IEWB
> > > > > > > >
> > > > > > > > R4
> > > > > > > > |
> > > > > > > > \
> > > > > > > > /
> > > > > > > > |
> > > > > > > > R5
> > > > > > > >
> > > > > > > > R4 connected via Serial link to R5
> > > > > > > >
> > > > > > > >
> > > > > > > > R4#sh run int ser1/1
> > > > > > > > Building configuration...
> > > > > > > >
> > > > > > > > Current configuration : 121 bytes
> > > > > > > > !
> > > > > > > > interface Serial1/1
> > > > > > > > ip address negotiated
> > > > > > > > encapsulation ppp
> > > > > > > > no peer default ip address
> > > > > > > > serial restart-delay 0
> > > > > > > > end
> > > > > > > >
> > > > > > > > R5#
> > > > > > > >
> > > > > > > > ip dhcp-server 132.20.53.3
> > > > > > > > !
> > > > > > > > interface Serial1/1
> > > > > > > > ip address 132.20.54.5 255.255.255.0
> > > > > > > > encapsulation ppp
> > > > > > > > peer default ip address dhcp
> > > > > > > > serial restart-delay 0
> > > > > > > > end
> > > > > > > >
> > > > > > > > R5#ping 132.20.53.3
> > > > > > > >
> > > > > > > > Type escape sequence to abort.
> > > > > > > > Sending 5, 100-byte ICMP Echos to 132.20.53.3, timeout is 2
> > > > > > > > seconds:
> > > > > > > > !!!!!
> > > > > > > >
> > > > > > > > R3 is the DHCP Server as you can see the above ping there is
> > > > > > > > no reachablilty
> > > > > > > > problem
> > > > > > > >
> > > > > > > > ip dhcp excluded-address 132.20.54.1 132.20.54.3
> > > > > > > > ip dhcp excluded-address 132.20.54.5 132.20.54.254
> > > > > > > > !
> > > > > > > > ip dhcp pool R4
> > > > > > > > network 132.20.54.0 255.255.255.0
> > > > > > > >
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:31.108: DHCPD: DHCPDISCOVER received from
> client
> > > > > > > >
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > *Mar 1 12:24: 31.112: DHCPD: Allocate an address without
> > > > > > > > class information (
> > > > > > > > 132.20.54.0)
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:33.116: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4 ).
> > > > > > > > *Mar 1 12:24:33.120: DHCPD: unicasting BOOTREPLY for client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > *Mar 1 12:24:33.656: DHCPD: DHCPDISCOVER received from
> client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > *Mar 1 12:24:33.660: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4).
> > > > > > > > *Mar 1 12:24:33.664: DHCPD: unicasting BOOTREPLY for client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:34.540: DHCPD: DHCPDISCOVER received from
> client
> > > > > > > >
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > *Mar 1 12:24: 34.540: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4).
> > > > > > > > *Mar 1 12:24:34.540: DHCPD: unicasting BOOTREPLY for client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:37.700 : DHCPD: DHCPDISCOVER received from
> > > > > > > > client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > *Mar 1 12:24:37.700: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4).
> > > > > > > > *Mar 1 12:24:37.700 : DHCPD: unicasting BOOTREPLY for
> client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > *Mar 1 12:24:38.624: DHCPD: DHCPDISCOVER received from
> client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:38.628: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4).
> > > > > > > > *Mar 1 12:24:38.632: DHCPD: unicasting BOOTREPLY for client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:41.672: DHCPD: DHCPDISCOVER received from
> client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > *Mar 1 12:24:41.676: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4).
> > > > > > > > *Mar 1 12:24:41.680: DHCPD: unicasting BOOTREPLY for client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:42.740: DHCPD: DHCPDISCOVER received from
> client
> > > > > > > >
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > *Mar 1 12:24: 42.744: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4).
> > > > > > > > *Mar 1 12:24:42.748: DHCPD: unicasting BOOTREPLY for client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:46.660 : DHCPD: DHCPDISCOVER received from
> > > > > > > > client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > *Mar 1 12:24:46.664: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4).
> > > > > > > > *Mar 1 12:24:46.668 : DHCPD: unicasting BOOTREPLY for
> client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > *Mar 1 12:24:46.876: DHCPD: DHCPDISCOVER received from
> client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31through
> > > > > > > > relay
> > > > > > > > 132.20.54.5.
> > > > > > > > R3#
> > > > > > > > *Mar 1 12:24:46.880: DHCPD: Sending DHCPOFFER to client
> > > > > > > >
> > > > > > > >
> 0063.6973.636f.2d31.3332.2e32.302e.3534.2e35.2d53.6572.6961.6c31.2f31(
> > > > > > > > 132.20.54.4).
> > > > > > > > *Mar 1 12:24:46.884: DHCPD: unicasting BOOTREPLY for client
> > > > > > > > cc04.11a1.0000to relay
> > > > > > > > 132.20.54.5 .
> > > > > > > > R3#un all
> > > > > > > >
> > > > > > > > R4 as you can see is not reciving that address:
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > *Mar 1 12:34:24.264: Se1/1 IPCP: Timeout: State ACKsent
> > > > > > > > *Mar 1 12:34: 24.268: Se1/1 IPCP: O CONFREQ [ACKsent] id 9
> > > > > > > > len 10
> > > > > > > > *Mar 1 12:34: 24.268: Se1/1 IPCP: *Address 0.0.0.0*
> (0x030600000000)
> > > > > > > > *Mar 1 12:34:24.344: Se1/1 IPCP: I CONFREQ [ACKsent] id 9
> len
> > > > > > > > 10
> > > > > > > > *Mar 1 12:34:24.348: Se1/1 IPCP: Address 132.20.54.5
> (0x030684143605)
> > > > > > > > *Mar 1 12:34:24.352: Se1/1 IPCP: O CONFACK [ACKsent] id 9
> len
> > > > > > > > 10
> > > > > > > > *Mar 1 12:34:24.352 : Se1/1 IPCP: Address 132.20.54.5
> (0x030684143605)
> > > > > > > > *Mar 1 12:34:24.648: Se1/1 IPCP: I CONFREJ [ACKsent] id 7
> len
> > > > > > > > 10
> > > > > > > > *Mar 1 12:34:24.652: Se1/1 IPCP: *Address 0.0.0.0*
> (0x030600000000)
> > > > > > > > *Mar 1 12:34:24.652: Se1/1 IPCP: ID 7 didn't match 9,
> > > > > > > > discarding packet
> > > > > > > > R4(config)#
> > > > > > > > *Mar 1 12:34:26.252: Se1/1 IPCP: I CONFREQ [ACKsent] id 10
> > > > > > > > len 10
> > > > > > > > *Mar 1 12:34:26.252: Se1/1 IPCP: Address 132.20.54.5
> (0x030684143605)
> > > > > > > > *Mar 1 12:34:26.256: Se1/1 IPCP: O CONFACK [ACKsent] id 10
> > > > > > > > len 10
> > > > > > > > *Mar 1 12:34:26.260: Se1/1 IPCP: Address 132.20.54.5
> (0x030684143605)
> > > > > > > > *Mar 1 12:34:26.280: Se1/1 IPCP: Timeout: State ACKsent
> > > > > > > > *Mar 1 12:34:26.284: Se1/1 IPCP: O CONFREQ [ACKsent] id 10
> > > > > > > > len 10
> > > > > > > > *Mar 1 12:34:26.284: Se1/1 IPCP: *Address 0.0.0.0*
> (0x030600000000)
> > > > > > > > R4(config)#
> > > > > > > > *Mar 1 12:34:28.296: Se1/1 IPCP: Timeout: State ACKsent
> > > > > > > > *Mar 1 12:34:28.300: Se1/1 IPCP: State is ACKsent
> > > > > > > > *Mar 1 12:34: 28.784: Se1/1 IPCP: I CONFREJ [ACKsent] id 9
> > > > > > > > len 10
> > > > > > > > *Mar 1 12:34: 28.788: Se1/1 IPCP: *Address 0.0.0.0*
> (0x030600000000)
> > > > > > > > *Mar 1 12:34:28.788: Se1/1 IPCP: ID 9 didn't match 10,
> > > > > > > > discarding packe
> > > > > > > > R3 allocated the correct address:
> > > > > > > >
> > > > > > > > R3#sh ip dhcp binding
> > > > > > > > Bindings from all pools not associated with VRF:
> > > > > > > > IP address Client-ID/ Lease
> > > > > > > > expiration Type
> > > > > > > > Hardware address/
> > > > > > > > User name
> > > > > > > > 132.20.54.4 0063.6973.636f.2d31. Mar 01 2002
> 12:31
> > > > > > > > PM
> > > > > > > > Automatic
> > > > > > > > 3332.2e32.302e.3534 .
> > > > > > > > 2e35.2d53.6572.6961.
> > > > > > > > 6c31.2f31
> > > > > > > >
> > > > > > > > --
> > > > > > > > Shiran Guez
> > > > > > > > MCSE CCNP NCE1
> > > > > > > > http://cciep3.blogspot.com
> > > > > > > > http://www.linkedin.com/in/cciep3
> > > > > > > >
> > > > > > > >
> _______________________________________________________________________
> > > > > > > >
> > > > > > > > Subscription information may be found at:
> > > > > > > > http://www.groupstudy.com/list/CCIELab.html
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Shiran Guez
> > > > > MCSE CCNP NCE1
> > > > > http://cciep3.blogspot.com
> > > > > http://www.linkedin.com/in/cciep3
> > > > >
> > > >
> > > >
> > >
> > >
> > > --
> > > Shiran Guez
> > > MCSE CCNP NCE1
> > > http://cciep3.blogspot.com
> > > http://www.linkedin.com/in/cciep3
> > >
> >
> >
>
>
> --
> Shiran Guez
> MCSE CCNP NCE1
> http://cciep3.blogspot.com
> http://www.linkedin.com/in/cciep3
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
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