many thanks to tyson scott at ipexpert...
http://blog.ipexpert.com/2011/02/28/gns3-and-physical-switches-breakout-switch/#more-6136
the cloud and gns3 switch plus the 3750, represent the connection to the switched network...
i'm tunneling l2 through the 3750 to get there, and it is invisible, as below...
gns3rtr1#sh cdp neigh
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay
Device ID Local Intrfce Holdtme Capability Platform Port ID
core1.ozlan Fas 0/0 166 R S I WS-C3560- Fas 0/24
gns3rtr2#sh cdp neigh
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay
Device ID Local Intrfce Holdtme Capability Platform Port ID
core1.ozlan Fas 0/0 147 R S I WS-C3560- Fas 0/23
core1#sh cdp neigh
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay
Device ID Local Intrfce Holdtme Capability Platform Port ID
agg1.ozlan Fas 0/1 149 R S I WS-C3560- Fas 0/1
agg1.ozlan Fas 0/2 149 R S I WS-C3560- Fas 0/2
agg2.ozlan Fas 0/5 166 R S I WS-C3560- Fas 0/5
agg2.ozlan Fas 0/6 166 R S I WS-C3560- Fas 0/6
gns3rtr1.ozlan Fas 0/24 140 R 7206VXR Fas 0/0
gns3rtr2.ozlan Fas 0/23 159 R 7206VXR Fas 0/0
core2.ozlan Fas 0/4 143 R S I WS-C3560- Fas 0/4
core2.ozlan Fas 0/3 143 R S I WS-C3560- Fas 0/3
each router is in a separate vlan, the gns3 switch is access vlans to the routers, and dot1q to the cloud, vlan 1... there are two tunneled connections, one each per vlan from the 3750 to core1 on ports f0/23 and 24 respectively...
core1#sh vlan brie
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/7, Fa0/8, Fa0/9, Fa0/10
Fa0/11, Fa0/12, Fa0/13, Fa0/14
Fa0/15, Fa0/16, Fa0/17, Fa0/18
Fa0/19, Fa0/20, Fa0/21, Fa0/22
Gi0/1, Gi0/2
10 10 active
100 100 active
101 VLAN0101 active Fa0/24
102 VLAN0102 active Fa0/23
200 200 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
note trunked ports 1-6 to the switched network...
VLAN0010
Spanning tree enabled protocol rstp
Root ID Priority 4106
Address 0016.c706.9680
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 4106 (priority 4096 sys-id-ext 10)
Address 0016.c706.9680
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/1 Desg FWD 19 128.3 P2p Peer(STP)
Fa0/2 Desg FWD 19 128.4 P2p Peer(STP)
Fa0/3 Desg FWD 19 128.5 P2p
Fa0/4 Desg FWD 19 128.6 P2p
Fa0/5 Desg FWD 19 128.7 P2p
Fa0/6 Desg FWD 19 128.8 P2p
behavior is expected... i haven't dicked around with mtu and difficulties that presents with ospf yet... i'm simply happy that l2 is functioning properly... as has been stated by others, the plan is not to troubleshoot gns3, the plan is to perform labs...
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