Thanks for you answer. Not really like it, but if it's not working, not working, anyone already open a ticket to cisco about this ? ... View more

Hi, Thanks you all for the answer. I used to suffer a problem in a switch port years ago, the switch was only sent packet without receive any packet. (was not a wired problem). At this time we only choose to not use this port anymore. In my mind the udld was the solution for this problem. I read what UDLD was not necessary in copper wire because negociation already do the job, but for the etherchannel I use "switchport nonegotiate", and I would like be able to detect a cable problem. For etherchannel do you use "switchport nonegotiate" ? Do you really think desactivate the udld is the only solution ? (Someone know why is not working as excepted?). Thought this config has working some time at the beginning, (before the first reboot). Best regards ... View more

So, a lot of time later, but with the homework done. The Cisco "rapid-pvst" and the linksys "stp" mode are fully compatible. (Sure with the 14 second of delay). Best regards. Configuration used:   Cisco:          spanning-tree mode rapid-pvst                                                                  spanning-tree loopguard default                                                                no spanning-tree optimize bpdu transmission                                                    spanning-tree etherchannel guard misconfig                                                     spanning-tree extend system-id                                                                 spanning-tree vlan 1-1000 priority 0                                                           !                                              interface FastEthernet0/9                                                                       description lliure                                                                             switchport access vlan 10                                                                      switchport mode access                                                                         spanning-tree portfast                                                                         spanning-tree link-type point-to-point                                                        !                                                                                              interface FastEthernet0/10                                                                      description lliure                                                                             switchport access vlan 10                                                                      switchport mode access                                                                         spanning-tree portfast                                                                         spanning-tree link-type point-to-point   Linksys:           spanning-tree           spanning-tree priority 4096           spanning-tree pathcost method short           interface range ethernet g(11-24)            spanning-tree portfast           exit           interface range ethernet g(9-10)           spanning-tree link-type point-to-point Exemple: # sh spanning-tree                                                                                                                                             Spanning tree enabled mode STP Default port cost method:  short   Root ID    Priority    10              Address     00:15:63:c4:ef:00              Cost        19              Port        g9 sw-test01#sh spanning-tree vlan 10                                                    VLAN0010                                                                                Spanning tree enabled protocol rstp                                                   Root ID    Priority    10                                                                        Address     0015.63c4.ef00                                                            This bridge is the root                                                               Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec                    Bridge ID  Priority    10     (priority 0 sys-id-ext 10)                                         Address     0015.63c4.ef00                                                            Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec                              Aging Time  300 sec                                                      Interface           Role Sts Cost      Prio.Nbr Type                                  ------------------- ---- --- --------- -------- --------------------------------      Fa0/8               Desg FWD 19        128.10   P2p Edge                              Fa0/9               Desg FWD 19        128.11   P2p Peer(STP)                         Fa0/10              Desg FWD 19        128.12   P2p Peer(STP) ... View more

Just check the IOS version 12.4(24)T7 and it's working fine. ... View more

Hi Sebastian, First at all, sorry for the delay, just have some time to test it again. You're obviously right. The option I have: Cisco:(config)#spanning-tree mode ?   mst         Multiple spanning tree mode   pvst        Per-Vlan spanning tree mode   rapid-pvst  Per-Vlan rapid spanning tree mode Linksys:(config)# spanning-tree mode   stp                  Specify IEEE 802.1D Spanning Tree Protocol   rstp                 Configure IEEE 802.1W Rapid Spanning Tree Protocol   mstp                 Configure IEEE 802.1S Multiple Spanning Tree Protocol In the link you send me: Based on the original IEEE 802.1w standard, RSTP can have multiple VLANs 10, 20, 20 and 40 but will only have a single instance of spanning tree running for all VLANs, just like the Traditional STP 802.1D (CST).  The  IEEE 802.1w RSTP standard does not support multiple instances of STP,  it does support multiple VLANs.  Cisco's version of RSTP, known as  RPVST+, combines RSTP with PVST+, and uses a separate instance of spanning tree for each VLAN, just like their proprietary PVST+. For now, thought I could try the mstp/mst solutions, but I will keep it simple, so I will try the rapid-pvst/stp solution, and I will comment you. Best regards. ... View more

Hi, Now I need to wait the new version to test it Cisco answer: "The bug CSCtt99073 now has a fix and the fix would be present in the IOS versions 12.4(24)T7 and 15.2(1)T2. The IOS version 12.4(24)T7 would be released on CCO on 03/16/2012 and 15.2(1)T2 on 02/17/2012." Cisco Symptom: "The checksum recalculation for the packet after NAT fixup is causing the corruption of data in the TCP or UDP packet." Best regards. ... View more

I already test un new custom IOS witch solve this problem, but witch in the same time add some problem for example for DNS. Have a new ticket for the new bug. I will update. Best regards ... View more

Hi, Cisco point me the problem: With : "ip nat inside source static 10.0.0.2 xx.xx.xx.xx"  it's working. But with: "ip nat inside source static 10.0.0.2 xx.xx.xx.xx  no-payload" we have the problem. So nat static, with no "pay-load", with "ip virtual-reassembly" with packet > 1472, we have the problem. Now i'am waiting for the correction . Best regards. ... View more