Re: Trunk Between GNS3 on Ubuntu not fowarding traffic

Instead of Linux TAP interfaces in GNS3, try the Generic one. Does that
help?

Keller Giacomarro
keller.g_at_gmail.com

On Tue, Apr 24, 2012 at 5:55 AM, Darlington Ngaiso <ngaissod_at_gmail.com>wrote:

> Hi Experts
>
> have got a Virtual Lab connected to four physical switches via a Breakout
> Switch. The problem is that I cant ping across the Virtual Lab to the
> physical switches. I can see the Routers from the Switches via CDP but I
> can't see the Switches on the Virtual Routers in GNS3. It was working and
> then stopped working and have never been able to figure out why its not
> working.
>
> Config on the breakout Switch
>
> interface FastEthernet1/0/1
> description UP TO UBUNTU HOST
> switchport trunk encapsulation dot1q
> switchport trunk allowed vlan 102-120
> switchport mode trunk
> *l2protocol-tunnel cdp
> l2protocol-tunnel stp
> l2protocol-tunnel vtp*
> no cdp enable
> spanning-tree portfast
> no shut
>
> config on the tunnel Interfaces
>
> interface range fa1/0/2 ? 21
> no cdp enable
> spanning-tree portfast
> l2protocol-tunnel cdp
> l2protocol-tunnel stp
> l2protocol-tunnel vtp
> switchport mode dot1q-tunnel
> no shut
>
> regards
>
>
> If I run a tcpdump on the Servers connecting to the Physical switches Im
> able to see information coming from the Virtual lab Routers but I cant seem
> to get the same information from the physical switches back to the virtual
> lab
>
> Below is the `TCPDUMP results fro some of the routers
>
> root_at_rdpserver:~# tcpdump -vvv -i eth0 vlan 123
> tcpdump: WARNING: eth0: no IPv4 address assigned
> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
> bytes
> 09:21:14.618359 CDPv2, ttl: 180s, checksum: 692 (unverified), length 327
> Device-ID (0x01), length: 2 bytes: 'R3'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 0.0.0.0
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:22:14.622721 CDPv2, ttl: 180s, checksum: 692 (unverified), length 327
> Device-ID (0x01), length: 2 bytes: 'R3'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 0.0.0.0
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch,
> root_at_rdpserver:~# tcpdump -vvv -i eth0 vlan 121
> tcpdump: WARNING: eth0: no IPv4 address assigned
> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
> bytes
> 09:26:09.977414 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R1'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.10.10.1
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:27:09.982190 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R1'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.10.10.1
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:28:09.996767 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R1'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.10.10.1
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
> ^C
> 3 packets captured
> 3 packets received by filter
> 0 packets dropped by kernel
> root_at_rdpserver:~#
> root_at_rdpserver:~#
> root_at_rdpserver:~#
> root_at_rdpserver:~#
> root_at_rdpserver:~# tcpdump -vvv -i eth0 vlan 121
> tcpdump: WARNING: eth0: no IPv4 address assigned
> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
> bytes
> ^C
> 0 packets captured
> 0 packets received by filter
> 0 packets dropped by kernel
> root_at_rdpserver:~# tcpdump -vvv -i eth0 vlan 222
> tcpdump: WARNING: eth0: no IPv4 address assigned
> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
> bytes
> 09:30:12.273612 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R2'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.1.100.2
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:31:12.273833 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R2'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.1.100.2
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:32:12.288385 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R2'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.1.100.2
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:33:12.302879 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R2'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.1.100.2
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:34:12.324436 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R2'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.1.100.2
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:34:39.757590 c2:08:08:87:00:00 (oui Unknown) > ab:00:00:02:00:00 (oui
> Unknown), ethertype 802.1Q (0x8100), length 81:
> 0x0000: 3d00 0700 0000 0100 0303 0000 0200 0221 =..............!
> 0x0010: 0003 0006 0000 0000 0000 0400 023c 0005 .............<..
> 0x0020: 0002 d805 0600 0200 0107 0006 c208 0887 ................
> 0x0030: 0000 6400 0179 9001 0101 9101 02ee 05 ..d..y.........
> 09:35:12.346970 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R2'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.1.100.2
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.1.100.0/24
> VTP Management Domain (0x09), length: 0 byte: ''
>
> 0 packets dropped by kernel
> root_at_rdpserver:~# tcpdump -vvv -i eth0 vlan 224
> tcpdump: WARNING: eth0: no IPv4 address assigned
> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
> bytes
> 09:49:03.369383 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R4'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.0.0.4
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.0.0.0/8
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:49:40.952482 c2:06:08:87:00:00 (oui Unknown) > ab:00:00:02:00:00 (oui
> Unknown), ethertype 802.1Q (0x8100), length 81:
> 0x0000: 3d00 0700 0000 0100 0303 0000 0200 0221 =..............!
> 0x0010: 0003 0006 0000 0000 0000 0400 023c 0005 .............<..
> 0x0020: 0002 d805 0600 0200 0107 0006 c206 0887 ................
> 0x0030: 0000 6400 0179 9001 0101 9101 02ee 05 ..d..y.........
> 09:50:03.385696 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R4'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.0.0.4
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.0.0.0/8
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:51:03.411774 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R4'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.0.0.4
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.0.0.0/8
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:52:03.437268 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R4'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.0.0.4
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.0.0.0/8
> VTP Management Domain (0x09), length: 0 byte: ''
> 09:53:03.442412 CDPv2, ttl: 180s, checksum: 692 (unverified), length 336
> Device-ID (0x01), length: 2 bytes: 'R4'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 10.0.0.4
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> Prefixes (0x07), length: 5 bytes: IPv4 Prefixes (1): 10.0.0.0/8
> VTP Management Domain (0x09), length: 0 byte: ''
> ^C
> 6 packets captured
> 6 packets received by filter
> 0 packets dropped by kernel
> root_at_rdpserver:~# tcpdump -vvv -i eth0 vlan 226
> tcpdump: WARNING: eth0: no IPv4 address assigned
> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535
> bytes
> 09:54:08.093644 CDPv2, ttl: 180s, checksum: 692 (unverified), length 327
> Device-ID (0x01), length: 2 bytes: 'R6'
> Version String (0x05), length: 246 bytes:
> Cisco IOS Software, 3700 Software (C3725-ADVIPSERVICESK9-M), Version
> 12.4(12), RELEASE SOFTWARE (fc1)
> Technical Support: http://www.cisco.com/techsupport
> Copyright (c) 1986-2006 by Cisco Systems, Inc.
> Compiled Fri 17-Nov-06 14:48 by prod_rel_team
> Platform (0x06), length: 10 bytes: 'Cisco 3725'
> Address (0x02), length: 13 bytes: IPv4 (1) 0.0.0.0
> Port-ID (0x03), length: 15 bytes: 'FastEthernet0/0'
> Capability (0x04), length: 4 bytes: (0x00000029): Router, L2 Switch, IGMP
> snooping
> VTP Management Domain (0x09), length: 0 byte:
>
>
> And a debug on the Virtual routers show that traffic is the routers toward
> the trunk to the Virtual Switches
>
>
> Below is the diagram of the setup
>
>
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Received on Tue Apr 24 2012 - 06:16:13 ART