Switching Lab: VTP - Packet Life

20 posts

2 Jan 2010 at 3:26 a.m. UTC

Greetings fellow Cisco labbers,

I imagine that there are a few of you here, if not all of you, who also use dynamips to supplement your labbing efforts.

I am studying for the BCMSN exam.

I am trying to learn about switching.

I have learned that with dynamips we are able to configure the router to act like a switch. I have set up the following switch lab using dynamips but am not able to get the VTP client to pick up the new VLAN from the VTP server.


SW1#show vtp status
VTP Version                     : 2
Configuration Revision          : 0
Maximum VLANs supported locally : 256
Number of existing VLANs        : 5
VTP Operating Mode              : Client
VTP Domain Name                 :
VTP Pruning Mode                : Disabled
VTP V2 Mode                     : Disabled
VTP Traps Generation            : Disabled
MD5 digest                      : 0xBF 0x86 0x94 0x45 0xFC 0xDF 0xB5 0x70
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

SW1#show vlan-switch

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4
                                                Fa0/5, Fa0/6, Fa0/7, Fa0/8
                                                Fa0/9, Fa0/10, Fa0/11, Fa0/12
                                                Fa0/13, Fa0/14, Fa0/15
1002 fddi-default                     active
1003 token-ring-default               active
1004 fddinet-default                  active
1005 trnet-default                    active

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1    enet  100001     1500  -      -      -        -    -        1002   1003
1002 fddi  101002     1500  -      -      -        -    -        1      1003
1003 tr    101003     1500  1005   0      -        -    srb      1      1002
1004 fdnet 101004     1500  -      -      1        ibm  -        0      0
1005 trnet 101005     1500  -      -      1        ibm  -        0      0

SW2#show vtp status
VTP Version                     : 2
Configuration Revision          : 1
Maximum VLANs supported locally : 256
Number of existing VLANs        : 6
VTP Operating Mode              : Server
VTP Domain Name                 :
VTP Pruning Mode                : Disabled
VTP V2 Mode                     : Disabled
VTP Traps Generation            : Disabled
MD5 digest                      : 0x95 0x71 0xD2 0x24 0x49 0x35 0xB7 0x26
Configuration last modified by 0.0.0.0 at 3-1-02 00:11:42
Local updater ID is 0.0.0.0 (no valid interface found)

SW2#show vlan-switch

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4
                                                Fa0/5, Fa0/6, Fa0/7, Fa0/8
                                                Fa0/9, Fa0/10, Fa0/11, Fa0/12
                                                Fa0/13, Fa0/14, Fa0/15
2    PACKET_LIFE                      active
1002 fddi-default                     active
1003 token-ring-default               active
1004 fddinet-default                  active
1005 trnet-default                    active

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1    enet  100001     1500  -      -      -        -    -        1002   1003
2    enet  100002     1500  -      -      -        -    -        0      0
1002 fddi  101002     1500  -      -      -        -    -        1      1003
1003 tr    101003     1500  1005   0      -        -    srb      1      1002
1004 fdnet 101004     1500  -      -      1        ibm  -        0      0
1005 trnet 101005     1500  -      -      1        ibm  -        0      0


Maybe it's just dynamips. I'll try to get it working on the real equipment tomorrow night.

Doug_Kenline

20 posts

2 Jan 2010 at 3:46 a.m. UTC

Now it's working. Had to shake it up by creating some more VLANs on the VTP server.

SW1#show vlan-switch

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4
                                                Fa0/5, Fa0/6, Fa0/7, Fa0/8
                                                Fa0/9, Fa0/10, Fa0/11, Fa0/12
                                                Fa0/13, Fa0/14, Fa0/15
2    PACKET_LIFE                      active
4    HANG_TEN                         active
8    SURFER_GIRL                      active
99   HOT_MAMA                         active
1002 fddi-default                     active
1003 token-ring-default               active
1004 fddinet-default                  active
1005 trnet-default                    active

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1    enet  100001     1500  -      -      -        -    -        1002   1003
2    enet  100002     1500  -      -      -        -    -        0      0
4    enet  100004     1500  -      -      -        -    -        0      0
8    enet  100008     1500  -      -      -        -    -        0      0
99   enet  100099     1500  -      -      -        -    -        0      0
1002 fddi  101002     1500  -      0      -        -    -        1      1003
1003 tr    101003     1500  1005   0      -        -    srb      1      1002
1004 fdnet 101004     1500  -      -      1        ibm  -        0      0
1005 trnet 101005     1500  -      -      1        ibm  -        0      0

SW2#show vlan-switch

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4
                                                Fa0/5, Fa0/6, Fa0/7, Fa0/8
                                                Fa0/9, Fa0/10, Fa0/11, Fa0/12
                                                Fa0/13, Fa0/14, Fa0/15
2    PACKET_LIFE                      active
4    HANG_TEN                         active
8    SURFER_GIRL                      active
99   HOT_MAMA                         active
1002 fddi-default                     active
1003 token-ring-default               active
1004 fddinet-default                  active
1005 trnet-default                    active

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1    enet  100001     1500  -      -      -        -    -        1002   1003
2    enet  100002     1500  -      -      -        -    -        0      0
4    enet  100004     1500  -      -      -        -    -        0      0
8    enet  100008     1500  -      -      -        -    -        0      0
99   enet  100099     1500  -      -      -        -    -        0      0
1002 fddi  101002     1500  -      -      -        -    -        1      1003
1003 tr    101003     1500  1005   0      -        -    srb      1      1002
1004 fdnet 101004     1500  -      -      1        ibm  -        0      0
1005 trnet 101005     1500  -      -      1        ibm  -        0      0

I think that there is no way to do Etherchannel lab using dynamips GNS3 setup. Will also do etherchannel lab on live equipment tomorrow night.

Update: I just created a single channel etherchannel using my GNS3 dynamips switches. But I guess there's no way to do multi-channel etherchannels on here. I'll have to save that one for the big bad stretch lab tomorrow night.

SW1#show int port-channel 1
Port-channel1 is up, line protocol is up
  Hardware is EtherChannel, address is cc11.139c.f000 (bia cc11.139c.f000)
  MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s
  Members in this channel: Fa0/0
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:03:04, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

SW1#show int port-channel 1 switchport
Name: Po1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Disabled
Access Mode VLAN: 0 ((Inactive))
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 1-2,4,8,99
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none

SW1#show interfaces trunk

Port      Mode         Encapsulation  Status        Native vlan
Po1       on           802.1q         trunking      1

Port      Vlans allowed on trunk
Po1       1-1005

Port      Vlans allowed and active in management domain
Po1       1-2,4,8,99

Port      Vlans in spanning tree forwarding state and not pruned
Po1       1-2,4,8,99

Doug_Kenline

20 posts

3 Jan 2010 at 9:47 p.m. UTC

Next lab try reset switch to factory default settings.

SW1#write erase
SW1#del vlan.dat
SW1#reload
SW1#save config? no

luismg

130 posts

4 Jan 2010 at 4:28 a.m. UTC

Hello, look carefully some routers uses the new way of creating vlan, that is not with "vlan database" and even its stored on vlan.dat on the startup.conf exist the commands to create vlans,

vlan 10 name phones vlan 20 name pcs

careful with that, also if they are learn through vtp some swiches stores that info in the startup config.

My advice is delete vlan.dat and the startup config and start over.

Kind regards

Nadeem_Rafi

5 posts

4 Jan 2010 at 8:31 a.m. UTC

for vtp to work on switches vtp domain name should be present, which in your case is not there. VTP updates dont work if domain name is not present.

HTH

joshlowe

101 posts

4 Jan 2010 at 5:12 p.m. UTC

Also, if you create your vlans first, then set up the VTP domain and server, you may find your revision number on the VTP server is still 0, and the clients won't pick anything up from it. This is most likely why creating a new VLAN on your server caused VTP to start working, it increased the revision number from 0.

The better way to do it would be to create your VTP server and set the domain first, then add your VLANs to make sure they are propagated to the clients correctly.

Doug_Kenline 20 posts	2 Jan 2010 at 3:26 a.m. UTC Greetings fellow Cisco labbers, I imagine that there are a few of you here, if not all of you, who also use dynamips to supplement your labbing efforts. I am studying for the BCMSN exam. I am trying to learn about switching. I have learned that with dynamips we are able to configure the router to act like a switch. I have set up the following switch lab using dynamips but am not able to get the VTP client to pick up the new VLAN from the VTP server. SW1#show vtp status VTP Version : 2 Configuration Revision : 0 Maximum VLANs supported locally : 256 Number of existing VLANs : 5 VTP Operating Mode : Client VTP Domain Name : VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0xBF 0x86 0x94 0x45 0xFC 0xDF 0xB5 0x70 Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00 SW1#show vlan-switch VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/5, Fa0/6, Fa0/7, Fa0/8 Fa0/9, Fa0/10, Fa0/11, Fa0/12 Fa0/13, Fa0/14, Fa0/15 1002 fddi-default active 1003 token-ring-default active 1004 fddinet-default active 1005 trnet-default active VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1 enet 100001 1500 - - - - - 1002 1003 1002 fddi 101002 1500 - - - - - 1 1003 1003 tr 101003 1500 1005 0 - - srb 1 1002 1004 fdnet 101004 1500 - - 1 ibm - 0 0 1005 trnet 101005 1500 - - 1 ibm - 0 0 SW2#show vtp status VTP Version : 2 Configuration Revision : 1 Maximum VLANs supported locally : 256 Number of existing VLANs : 6 VTP Operating Mode : Server VTP Domain Name : VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0x95 0x71 0xD2 0x24 0x49 0x35 0xB7 0x26 Configuration last modified by 0.0.0.0 at 3-1-02 00:11:42 Local updater ID is 0.0.0.0 (no valid interface found) SW2#show vlan-switch VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/5, Fa0/6, Fa0/7, Fa0/8 Fa0/9, Fa0/10, Fa0/11, Fa0/12 Fa0/13, Fa0/14, Fa0/15 2 PACKET_LIFE active 1002 fddi-default active 1003 token-ring-default active 1004 fddinet-default active 1005 trnet-default active VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1 enet 100001 1500 - - - - - 1002 1003 2 enet 100002 1500 - - - - - 0 0 1002 fddi 101002 1500 - - - - - 1 1003 1003 tr 101003 1500 1005 0 - - srb 1 1002 1004 fdnet 101004 1500 - - 1 ibm - 0 0 1005 trnet 101005 1500 - - 1 ibm - 0 0 Maybe it's just dynamips. I'll try to get it working on the real equipment tomorrow night.
Doug_Kenline 20 posts	2 Jan 2010 at 3:46 a.m. UTC Now it's working. Had to shake it up by creating some more VLANs on the VTP server. SW1#show vlan-switch VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/5, Fa0/6, Fa0/7, Fa0/8 Fa0/9, Fa0/10, Fa0/11, Fa0/12 Fa0/13, Fa0/14, Fa0/15 2 PACKET_LIFE active 4 HANG_TEN active 8 SURFER_GIRL active 99 HOT_MAMA active 1002 fddi-default active 1003 token-ring-default active 1004 fddinet-default active 1005 trnet-default active VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1 enet 100001 1500 - - - - - 1002 1003 2 enet 100002 1500 - - - - - 0 0 4 enet 100004 1500 - - - - - 0 0 8 enet 100008 1500 - - - - - 0 0 99 enet 100099 1500 - - - - - 0 0 1002 fddi 101002 1500 - 0 - - - 1 1003 1003 tr 101003 1500 1005 0 - - srb 1 1002 1004 fdnet 101004 1500 - - 1 ibm - 0 0 1005 trnet 101005 1500 - - 1 ibm - 0 0 SW2#show vlan-switch VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/5, Fa0/6, Fa0/7, Fa0/8 Fa0/9, Fa0/10, Fa0/11, Fa0/12 Fa0/13, Fa0/14, Fa0/15 2 PACKET_LIFE active 4 HANG_TEN active 8 SURFER_GIRL active 99 HOT_MAMA active 1002 fddi-default active 1003 token-ring-default active 1004 fddinet-default active 1005 trnet-default active VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1 enet 100001 1500 - - - - - 1002 1003 2 enet 100002 1500 - - - - - 0 0 4 enet 100004 1500 - - - - - 0 0 8 enet 100008 1500 - - - - - 0 0 99 enet 100099 1500 - - - - - 0 0 1002 fddi 101002 1500 - - - - - 1 1003 1003 tr 101003 1500 1005 0 - - srb 1 1002 1004 fdnet 101004 1500 - - 1 ibm - 0 0 1005 trnet 101005 1500 - - 1 ibm - 0 0 I think that there is no way to do Etherchannel lab using dynamips GNS3 setup. Will also do etherchannel lab on live equipment tomorrow night. Update: I just created a single channel etherchannel using my GNS3 dynamips switches. But I guess there's no way to do multi-channel etherchannels on here. I'll have to save that one for the big bad stretch lab tomorrow night. SW1#show int port-channel 1 Port-channel1 is up, line protocol is up Hardware is EtherChannel, address is cc11.139c.f000 (bia cc11.139c.f000) MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 100Mb/s Members in this channel: Fa0/0 ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:03:04, output never, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 input packets with dribble condition detected 0 packets output, 0 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out SW1#show int port-channel 1 switchport Name: Po1 Switchport: Enabled Administrative Mode: trunk Operational Mode: trunk Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: Disabled Access Mode VLAN: 0 ((Inactive)) Trunking Native Mode VLAN: 1 (default) Trunking VLANs Enabled: ALL Trunking VLANs Active: 1-2,4,8,99 Priority for untagged frames: 0 Override vlan tag priority: FALSE Voice VLAN: none Appliance trust: none SW1#show interfaces trunk Port Mode Encapsulation Status Native vlan Po1 on 802.1q trunking 1 Port Vlans allowed on trunk Po1 1-1005 Port Vlans allowed and active in management domain Po1 1-2,4,8,99 Port Vlans in spanning tree forwarding state and not pruned Po1 1-2,4,8,99
Doug_Kenline 20 posts	3 Jan 2010 at 9:47 p.m. UTC Next lab try reset switch to factory default settings. SW1#write erase SW1#del vlan.dat SW1#reload SW1#save config? no
luismg 130 posts	4 Jan 2010 at 4:28 a.m. UTC Hello, look carefully some routers uses the new way of creating vlan, that is not with "vlan database" and even its stored on vlan.dat on the startup.conf exist the commands to create vlans, vlan 10 name phones vlan 20 name pcs careful with that, also if they are learn through vtp some swiches stores that info in the startup config. My advice is delete vlan.dat and the startup config and start over. Kind regards
Nadeem_Rafi 5 posts	4 Jan 2010 at 8:31 a.m. UTC for vtp to work on switches vtp domain name should be present, which in your case is not there. VTP updates dont work if domain name is not present. HTH
joshlowe 101 posts	4 Jan 2010 at 5:12 p.m. UTC Also, if you create your vlans first, then set up the VTP domain and server, you may find your revision number on the VTP server is still 0, and the clients won't pick anything up from it. This is most likely why creating a new VLAN on your server caused VTP to start working, it increased the revision number from 0. The better way to do it would be to create your VTP server and set the domain first, then add your VLANs to make sure they are propagated to the clients correctly.