I am having trouble trunking these two switches together. I am running a Here is the following information that I am seeing:
I have a foundry router trunking to the gig port on a 3548. I am announcing the 10.5.0.1/29 off of the virtual interface 7. I have set the mgnt vlan (int vlan 7 )10.5.0.2/29, and can ping across to gateway...but I can't get the 3548 to trunk with the 2950 (10.5.0.3)? I don't know if looking at the sh int * switchport is telling me something or not. On the 3548, I see the following "Access Mode VLAN: 0 ((Inactive))", and on the 2950 I see this, "Access Mode VLAN: 1 (default)." I keep getting incomplete arp entries, and can't ping across. I have tried to the "switchport nonegotiate" on the 2950 as well, and this didn't change anything. I have changed both switches native vlan from 1 to 1000, and have moved the mgnt vlan from 1 and 7 as well.Then I tried to trunk two 2950s...same config on both and no luck, until I enable the "switchport nonegotiate" command on both switch ports. Any ideas of what I may be doing wrong.
gig3-3548#sh arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.5.0.3 0 Incomplete ARPA
Internet 10.5.0.2 - 0007.8502.c740 ARPA VLAN7
Internet 10.5.0.1 95 0004.8048.7500 ARPA VLAN7
interface FastEthernet0/1
duplex full
speed 100
switchport trunk encapsulation dot1q
switchport mode trunk
no cdp enable
!
gig3-3548#sh int fa0/1 switchport
Name: Fa0/1
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 (VLAN1)
Trunking VLANs Enabled: ALL
Trunking VLANs Active: 1,7,1000
Pruning VLANs Enabled: 2-1001
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
gig3-3548#sh vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active 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, Fa0/16, Fa0/17,
Fa0/18, Fa0/19, Fa0/20, Fa0/21,
Fa0/22, Fa0/23, Fa0/24, Fa0/25,
Fa0/26, Fa0/27, Fa0/28, Fa0/29,
Fa0/30, Fa0/31, Fa0/32, Fa0/33,
Fa0/34, Fa0/35, Fa0/36, Fa0/37,
Fa0/38, Fa0/39, Fa0/40, Fa0/41,
Fa0/42, Fa0/43, Fa0/44, Fa0/45,
Fa0/46, Fa0/47, Fa0/48, Gi0/2
7 VLAN0007 active
1000 VLAN1000 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
7 enet 100007 1500 - - - - - 0 0
1000 enet 101000 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
interface FastEthernet0/1
description gig-3548
switchport mode trunk
no ip address
duplex full
speed 100
no cdp enable
agg5-2950#sh int fa0/1 switchport
Name: Fa0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Protected: false
Voice VLAN: none (Inactive)
Appliance trust: none
agg5-2950#sh vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active 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, Fa0/16, Fa0/17
Fa0/18, Fa0/19, Fa0/20, Fa0/21
Fa0/22, Fa0/23, Fa0/24
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 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0
TIA,
D-
