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Community Member

Vlan Trunking issue between 6509 & 3750

Has anyone encountered issues with creating a vlan or trunking between 6509 and 3750? When we enable the vlan 143 (don't know why this vlan number) or enable trunking to include vlan 143, the 6509 starts dropping other vlans and goes into the spanning tree loop.

sh ver for 6509

Cisco Internetwork Operating System Software

IOS (tm) MSFC2 Software (C6MSFC2-JK2SV-M), Version 12.1(11b)E11, EARLY DEPLOYMENT RELEASE SOFTWARE (fc2)

TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Fri 27-Dec-02 10:56 by hqluong

Image text-base: 0x40008980, data-base: 0x41AA6000

ROM: System Bootstrap, Version 12.1(3r)E2, RELEASE SOFTWARE (fc1)

BOOTLDR: MSFC2 Software (C6MSFC2-BOOT-M), Version 12.1(7)E, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

LightSt uptime is 11 weeks, 4 hours, 0 minutes

System returned to ROM by power-on

System restarted at 08:03:55 Eastern Sun Aug 3 2003

Running default software

cisco Cat6k-MSFC2 (R7000) processor with 114688K/16384K bytes of memory.

Processor board ID SAD052001WS

R7000 CPU at 300Mhz, Implementation 39, Rev 2.1, 256KB L2, 1024KB L3 Cache

Last reset from power-on

Bridging software.

X.25 software, Version 3.0.0.

SuperLAT software (copyright 1990 by Meridian Technology Corp).

TN3270 Emulation software.

93 Virtual Ethernet/IEEE 802.3 interface(s)

509K bytes of non-volatile configuration memory.

sh ver for 3750

Cisco Internetwork Operating System Software

IOS (tm) C3750 Software (C3750-I9-M), Version 12.1(11)AX, RELEASE SOFTWARE (fc3)

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Mon 21-Apr-03 11:37 by madison

Image text-base: 0x00003000, data-base: 0x006BA6CC

ROM: Bootstrap program is C3750 boot loader

BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.1(11r)AX, RELEASE SOFTWARE (fc1)

dr3750-1 uptime is 22 hours, 17 minutes

System returned to ROM by power-on

System restarted at 11:27:14 EDT Sun Oct 19 2003

System image file is "flash:c3750-i9-mz.121.11-AX/c3750-i9-mz.121.11-AX.bin"

cisco WS-C3750G-24T-S (PowerPC405) processor (revision A0) with 120822K/10240K bytes of memory.

Processor board ID CAT0734X1E1

Last reset from power-on

3 Virtual Ethernet/IEEE 802.3 interface(s)

24 Gigabit Ethernet/IEEE 802.3 interface(s)

The password-recovery mechanism is enabled.

Thanks in advance

3 REPLIES
Community Member

Re: Vlan Trunking issue between 6509 & 3750

what are the other vlans numbers (14,78)?

Community Member

Re: Vlan Trunking issue between 6509 & 3750

vlan 64 and vlan 94

Re: Vlan Trunking issue between 6509 & 3750

How many VLANs are configured?

"Cat3570 supports 128 spanning-tree instances. If a switch has more active VLANs than supported spanning-tree instances, spanning tree can be enabled on 128 VLANs and is disabled on the remaining VLANs. If you have already used all available spanning-tree instances on a switch, adding another VLAN anywhere in the VTP domain creates a VLAN on that switch that is not running spanning-tree. If you have the default allowed list on the trunk ports of that switch (which is to allow all VLANs), the new VLAN is carried on all trunk ports. Depending on the topology of the network, this could create a loop in the new VLAN that would not be broken, particularly if there are several adjacent switches that all have run out of spanning-tree instances. You can prevent this possibility by setting allowed lists on the trunk ports of switches that have used up their allocation of spanning-tree instances. "

See http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/12111ax/3750scg/swvlan.pdf for details.

Regards,

Milan

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