From: ccie2be (ccie2be@nyc.rr.com)
Date: Fri Nov 05 2004 - 11:57:14 GMT-3
Hey guys,
In the isdn portion of this task, I needed to configure dialer profiles on
both R4 and R5, have R5 call R4 and then make R4 hangup and callback R5. I
got this part to work. To confirm that this was working I used, isdn test
call int bri 0/0 5272034 and enabled debug dialer on R4. When I reviewed the
debug logs, I could see the call from R5 connect, then disconnect and then R4
callback R5.
However, I also needed to configure R4 to get it's dialer's interface ip
address from a dhcp server directly connected to R5.
I also enabled debug dhcp on R4 and R5, but I can't tell from the debug out
what's really going on. So, I don't know if R4 ever really got an ip address.
I've configured R4 and R5 as shown is the SG, but the dhcp part doesn't seem
to working, although I'm not 100% sure. Once the link was up after R4 called
back R5, I did several pings but those never were successful.
I was struggling with this for hours but never got pings to work across the
isdn link, so I'm hoping someone can help me understand what's going on.
Here's some output from deb dhcp on R5:
*Mar 1 07:08:42.478: DHCP Lease server: 0.0.0.0, state: 1 Selecting
*Mar 1 07:08:42.478: DHCP transaction id: FCC10C
*Mar 1 07:08:42.478: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:08:42.478: Next timer fires after: 00:00:03
*Mar 1 07:08:42.478: Retry count: 2 Client-ID:
cisco-139.3.45.5-BRI0/0:1
*Mar 1 07:08:42.478: DHCP: SDiscover: sending 285 byte length DHCP packet
*Mar 1 07:08:42.478: DHCP: SDiscover 285 bytes
*Mar 1 07:08:53.078: DHCP: QScan: Purging entry
*Mar 1 07:08:53.078: DHCP: deleting entry 622AE8CC 0.0.0.0 from list
*Mar 1 07:08:53.078: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:08:53.078: Temp sub net mask: 0.0.0.0
*Mar 1 07:08:53.078: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:08:53.078: DHCP transaction id: FCC107
*Mar 1 07:08:53.078: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:08:53.078: No timer running
*Mar 1 07:08:53.078: Retry count: 0 Client-ID:
*Mar 1 07:08:57.178: DHCP: QScan: Purging entry
*Mar 1 07:08:57.178: DHCP: deleting entry 629D70C0 0.0.0.0 from list
*Mar 1 07:08:57.178: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:08:57.178: Temp sub net mask: 0.0.0.0
*Mar 1 07:08:57.178: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:08:57.178: DHCP transaction id: FCC108
*Mar 1 07:08:57.178: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:08:57.178: No timer running
*Mar 1 07:08:57.178: Retry count: 0 Client-ID:
*Mar 1 07:09:01.278: DHCP: QScan: Purging entry
*Mar 1 07:09:01.278: DHCP: deleting entry 622AE168 0.0.0.0 from list
*Mar 1 07:09:01.278: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:09:01.278: Temp sub net mask: 0.0.0.0
*Mar 1 07:09:01.278: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:09:01.278: DHCP transaction id: FCC109
*Mar 1 07:09:01.278: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:09:01.278: No timer running
*Mar 1 07:09:01.278: Retry count: 0 Client-ID:
*Mar 1 07:09:05.378: DHCP: QScan: Purging entry
*Mar 1 07:09:05.378: DHCP: deleting entry 622A94C8 0.0.0.0 from list
*Mar 1 07:09:05.378: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:09:05.378: Temp sub net mask: 0.0.0.0
*Mar 1 07:09:05.378: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:09:05.378: DHCP transaction id: FCC10A
*Mar 1 07:09:05.378: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:09:05.378: No timer running
*Mar 1 07:09:05.378: No timer running
*Mar 1 07:09:09.478: DHCP: QScan: Purging entry
*Mar 1 07:09:09.478: DHCP: deleting entry 629D34B0 0.0.0.0 from list
*Mar 1 07:09:09.478: Temp IP addr: 0.0.0.0 for peer on Interface: unknown
*Mar 1 07:09:09.478: Temp sub net mask: 0.0.0.0
*Mar 1 07:09:09.478: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:09:09.478: DHCP transaction id: FCC10B
*Mar 1 07:09:09.478: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:09:09.478: No timer running
*Mar 1 07:09:09.478: Retry count: 0 Client-ID:
*Mar 1 07:09:13.578: DHCP: QScan: Purging entry
*Mar 1 07:09:13.578: DHCP: deleting entry 629D3684 0.0.0.0 from list
*Mar 1 07:09:13.578: Temp IP addr: 0.0.0.0 for peer on Interface: BRI0/0:1
*Mar 1 07:09:13.578: Temp sub net mask: 0.0.0.0
*Mar 1 07:09:13.578: DHCP Lease server: 0.0.0.0, state: 8 Purging
*Mar 1 07:09:13.578: DHCP transaction id: FCC10C
*Mar 1 07:09:13.578: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs
*Mar 1 07:09:13.578: No timer running
*Mar 1 07:09:13.578: Retry count: 0 Client-ID:
cisco-139.3.45.5-BRI0/0:1
*Mar 1 07:10:18.866: %ISDN-6-DISCONNECT: Interface BRI0/0:1 disconnected
from
5272034 , call lasted 120 seconds
*Mar 1 07:10:18.918: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to
down
*Mar 1 07:10:18.922: %DIALER-6-UNBIND: Interface BR0/0:1 unbound from profile
D
i1
*****************************************************************************
********************
I also did a deb dhcp on R1, the dhcp server, but got nothing at all.
Here's R4's config. R4 is the dhcp client and is suppose to get an ip address
assigned to it dialer interface.
interface Dialer1
ip address negotiated
encapsulation ppp
dialer pool 1
dialer string 5272035
dialer caller 5272035 callback
Here's R5's config:
ip dhcp-server 139.3.15.1
interface Dialer1
ip address 139.3.45.5 255.255.255.0
encapsulation ppp
dialer pool 1
dialer string 5272034
dialer-group 1
peer default ip address dhcp
Here's R1's config. R1 is the dhcp server.
ip dhcp excluded-address 139.3.45.5 139.3.45.255
ip dhcp excluded-address 139.3.45.0 139.3.45.3
!
ip dhcp pool FOR-R4
network 139.3.45.0 255.255.255.0
Here's the topology:
R4 --- isdn ---- R5 --- f/r --- R1
I'm not running any routing protocols, but R5 and R1 can ping each other.
R5 can call R4. When it does, R4 takes the call, hangup, and calls R5 back.
But, once the call is connected, R4 and R5 still can't ping each other. A
debug on R5 shows the pings are "unroutable". I don't know why since, of
course, R4 and R5 are directly connected via the isdn link.
Can anybody help me understand what's going on here with dhcp and the ping
problem?
Thanks for any insight.
Tim
This archive was generated by hypermail 2.1.4 : Thu Dec 02 2004 - 06:57:38 GMT-3