<div dir="ltr">Hi Friends, (excuse me for sending this to juniper as well as alcatel list..)<br>I am taking a second chance to get help on this.<br>I am trying to configure my cisco 850 cpe via adsl as a dhcp client to obtain address from the bras router.<br>
What i see is , the DHCPDISCOVER from cpe reaches the bras, and the bras replies back with the DHCPOFFER.<br>But DHCPOFFER is not being seen by cpe, though i see counters in incomming atm0.1 interfaces going up, indicating that packets is very well reaching the cpe, but not sure if its issue with bridging on cpe.<br>
<br>My setup is like this<br><br> ciscoCPE 850 -------adsl------DSLAM-------bras router.<br><br>I do see input counters go up in atm0.1, but no input counters on bvi interface. so suspecting a bridging issue.<br>-----------------<br>
<br>bridge irb<br>!<br>!<br>interface ATM0<br> no ip address<br> no atm ilmi-keepalive<br> dsl operating-mode auto <br> hold-queue 208 in<br>!<br>interface ATM0.1 point-to-point<br> no snmp trap link-status<br> pvc 8/37 <br>
encapsulation aal5snap<br> !<br> bridge-group 1<br>!<br>interface FastEthernet0<br>!<br>interface FastEthernet1<br>!<br>interface FastEthernet2<br>!<br>interface FastEthernet3<br>!<br>i<br>!<br>interface BVI1<br> ip address dhcp<br>
ip virtual-reassembly<br>!<br>!<br>ip http server<br>ip http authentication local<br>ip http secure-server<br>ip http timeout-policy idle 60 life 86400 requests 10000<br>ip nat inside source list 102 interface Dialer1 overload<br>
!<br>no cdp run<br>!<br>control-plane<br>!<br>bridge 1 protocol ieee<br>bridge 1 route ip<br><br>cpe3#sh bridge <br><br>Total of 300 station blocks, 299 free<br>Codes: P - permanent, S - self<br><br>Bridge Group 1:<br><br>
Address Action Interface Age RX count TX count<br>0030.8810.5098 forward ATM0.1 0 33 0<br>cpe3#sh sp<br>cpe3#sh spanning-tree <br><br> Bridge group 1 is executing the ieee compatible Spanning Tree protocol<br>
Bridge Identifier has priority 32768, address 0000.0cf0.2394<br> Configured hello time 2, max age 20, forward delay 15<br> We are the root of the spanning tree<br> Topology change flag not set, detected flag not set<br>
Number of topology changes 3 last change occurred 00:10:29 ago<br> from ATM0.1<br> Times: hold 1, topology change 35, notification 2<br> hello 2, max age 20, forward delay 15 <br> Timers: hello 1, topology change 0, notification 0, aging 300<br>
<br> Port 12 (ATM0.1) of Bridge group 1 is forwarding<br> Port path cost 1072, Port priority 128, Port Identifier 128.12.<br> Designated root has priority 32768, address 0000.0cf0.2394<br> Designated bridge has priority 32768, address 0000.0cf0.2394<br>
Designated port id is 128.12, designated path cost 0<br> Timers: message age 0, forward delay 0, hold 0<br> Number of transitions to forwarding state: 1<br> BPDU: sent 329, received 0<br><br> <br> VLAN1 is executing the ieee compatible Spanning Tree protocol<br>
Bridge Identifier has priority 32768, address 0018.1849.665f<br> Configured hello time 2, max age 20, forward delay 15<br> We are the root of the spanning tree<br> Topology change flag not set, detected flag not set<br>
Number of topology changes 1 last change occurred 00:57:01 ago<br> from FastEthernet0<br> Times: hold 1, topology change 35, notification 2<br> hello 2, max age 20, forward delay 15 <br> Timers: hello 1, topology change 0, notification 0, aging 300<br>
<br> Port 1 (FastEthernet0) of VLAN1 is forwarding<br> Port path cost 19, Port priority 128, Port Identifier 128.1.<br> Designated root has priority 32768, address 0018.1849.665f<br> Designated bridge has priority 32768, address 0018.1849.665f<br>
Designated port id is 128.1, designated path cost 0<br> Timers: message age 0, forward delay 0, hold 0<br> Number of transitions to forwarding state: 1<br> BPDU: sent 1724, received 0<br><br>cpe3#%Unknown DHCP problem.. No allocation poss<br>
<br>cpe3#sh interfaces atM 0.1<br>ATM0.1 is up, line protocol is up <br> Hardware is MPC ATMSAR (with Alcatel ADSL Module)<br> MTU 4470 bytes, BW 932 Kbit, DLY 390 usec, <br> reliability 255/255, txload 1/255, rxload 1/255<br>
Encapsulation ATM<br> 150 packets input, 47496 bytes<br> 1505 packets output, 166084 bytes <br> 0 OAM cells input, 0 OAM cells output<br> AAL5 CRC errors : 0<br> AAL5 SAR Timeouts : 0<br> AAL5 Oversized SDUs : 0<br>
Last clearing of "show interface" counters never<br>cpe3#sh inter<br>cpe3#sh interfaces bv<br>cpe3#sh interfaces bvI 1<br>BVI1 is up, line protocol is up <br> Hardware is BVI, address is 0000.0c6d.22b4 (bia 0018.1849.665f)<br>
Internet address will be negotiated using DHCP<br> MTU 4470 bytes, BW 932 Kbit, DLY 5000 usec, <br> reliability 255/255, txload 1/255, rxload 1/255<br> Encapsulation ARPA, loopback not set<br> ARP type: ARPA, ARP Timeout 04:00:00<br>
Last input 00:43:17, output never, output hang never<br> Last clearing of "show interface" counters never<br> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0<br> Queueing strategy: fifo<br>
Output queue: 0/0 (size/max)<br> 5 minute input rate 0 bits/sec, 0 packets/sec<br> 5 minute output rate 0 bits/sec, 0 packets/sec<br> 1 packets input, 74 bytes, 0 no buffer<br> Received 0 broadcasts, 0 runts, 0 giants, 0 throttles<br>
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort<br> 166 packets output, 94974 bytes, 0 underruns<br> 0 output errors, 0 collisions, 0 interface resets<br> 0 output buffer failures, 0 output buffers swapped out<br>
cpe3# <br><br>cpe3#debug dhcp detail <br>DHCP client activity debugging is on (detailed)<br>cpe3#<br>*Mar 8 20:25:11.999: DHCP: QScan: Purging entry<br>*Mar 8 20:25:11.999: DHCP: deleting entry 82D27A3C <a href="http://0.0.0.0">0.0.0.0</a> from list<br>
*Mar 8 20:25:11.999: Temp IP addr: <a href="http://0.0.0.0">0.0.0.0</a> for peer on Interface: BVI1<br>*Mar 8 20:25:11.999: Temp sub net mask: <a href="http://0.0.0.0">0.0.0.0</a><br>*Mar 8 20:25:11.999: DHCP Lease server: <a href="http://0.0.0.0">0.0.0.0</a>, state: 9 Purging<br>
*Mar 8 20:25:11.999: DHCP transaction id: D01<br>*Mar 8 20:25:11.999: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs<br>*Mar 8 20:25:11.999: No timer running<br>*Mar 8 20:25:11.999: Retry count: 0 Client-ID: cisco-0000.0c6d.22b4-BV1<br>
*Mar 8 20:25:11.999: Client-ID hex dump: 636973636F2D303030302E306336642E<br>*Mar 8 20:25:11.999: 323262342D425631<br>*Mar 8 20:25:11.999: Hostname: cpe3<br>*Mar 8 20:25:41.867: DHCP: Try 15 to acquire address for BVI1<br>
*Mar 8 20:25:41.867: DHCP: allocate request<br>*Mar 8 20:25:41.867: DHCP: new entry. add to queue, interface BVI1<br>*Mar 8 20:25:41.867: DHCP: SDiscover attempt # 1 for entry:<br>*Mar 8 20:25:41.867: Temp IP addr: <a href="http://0.0.0.0">0.0.0.0</a> for peer on Interface: BVI1<br>
*Mar 8 20:25:41.867: Temp sub net mask: <a href="http://0.0.0.0">0.0.0.0</a><br>*Mar 8 20:25:41.867: DHCP Lease server: <a href="http://0.0.0.0">0.0.0.0</a>, state: 1 Selecting<br>*Mar 8 20:25:41.867: DHCP transaction id: D02<br>
*Mar 8 20:25:41.867: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs<br>*Mar 8 20:25:41.867: Next timer fires after: 00:00:04<br>*Mar 8 20:25:41.867: Retry count: 1 Client-ID: cisco-0000.0c6d.22b4-BV1<br>*Mar 8 20:25:41.867: Client-ID hex dump: 636973636F2D303030302E306336642E<br>
*Mar 8 20:25:41.867: 323262342D425631<br>*Mar 8 20:25:41.867: Hostname: cpe3<br>*Mar 8 20:25:41.871: DHCP: SDiscover: sending 291 byte length DHCP packet<br>*Mar 8 20:25:41.871: DHCP: SDiscover 291 bytes <br>
*Mar 8 20:25:41.871: B'cast on BVI1 interface from <a href="http://0.0.0.0">0.0.0.0</a><br>*Mar 8 20:25:44.999: DHCP: SDiscover attempt # 2 for entry:<br>*Mar 8 20:25:44.999: Temp IP addr: <a href="http://0.0.0.0">0.0.0.0</a> for peer on Interface: BVI1<br>
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