how to configure a trunk between cisco switch and extreme switch

[zain_gabon]

Hi Support

i have an issue to connect a trunk between cisco switch and extreme switch

i have many vlans that i want to cross via a link between cisco 3750 switch and a Extreme Alpine 3800 switch

can someone help on this?

Regards

[Reza Sharifi]

What is the issue?

Also, can you provide configs from both 3800 and 3750?

[zain_gabon]

Hi Reza,

When i connect the cable to cisco port 1 (trunk configured), from a pc connected to cisco switch, i cannot ping extrme switch and vis versa

here is the cisco trunk port configuration (only vlan 128

interface GigabitEthernet0/1

switchport trunk encapsulation dot1q

switchport mode trunk

switchport trunk allowed vlan 128,129

Here, the configuration on Extreme switch with vlan 128 and 129, the is the port 1:32

LIBRSS01:23 # sh ports 1 : 32 vlan info
Port 1:32 (Billing-Core1)
Name               VID  Protocol Addr        Flags        Proto   Ports
OSS_VLAN           129  ------------------ --------       ANY     3/5 
Billing                   128  ------------------ --------       ANY     2/5 

LIBRSS01:24 #

the cable between switch is a cross-over

[cadet alain · Accepted solution]

Hi,

When i connect the cable to cisco port 1 (trunk configured), from a pc  connected to cisco switch, i cannot ping extrme switch and vis versa

What do you mean , you connect a PC on an access port on the Cisco switch and you can't access the management vlan from extreme switch and the other way around?

What is config of cisco switch port you  are connecting to ? what is IP config of the PC ? what is the management VLAN of extreme?

Alain.

[zain_gabon]

Hi Alain

My pc is connected to a access port on vlan 128,

and from it, i cannot ping another pc connected on vlan 128 on extreme switch

the cable between swicth is cross-over

[Reza Sharifi]

Ok, so you are using the extreme as your router.  On the 3750, can you verify:

if interface gi0/1 is in up up mode?  verify the interface your PC is connected to is in up and up mode

verify if vlan 128 is in up and up mode.  for all you can use sh ip int bri gi0/1 etc...

On the extreme side can you provide "sh vlan 128 det?

HTH

[zain_gabon]

here is the sh vlan 128 on extreme switch

LIBRSS01:24 # sh vlan Billing
VLAN Interface[20-213] with name "Billing" created by user
     Tagging:   802.1Q Tag 128
     Priority:  802.1P Priority 7
     STPD:      None
     Ignore-stp: Disabled on this vlan
     Ignore-bpdu: Disabled on this vlan
     Protocol:  Match all unfiltered protocols.
     Loopback:  Disable
     RateShape: Disable
     QosProfile:QP1
     QosIngress:None
     Ports:     5.     (Number of active ports=2)
        Flags:  (*) Active, Disabled
                (B) BcastDisabled, (R) RateLimited, (L) Loopback
                (g) Load Share Group
        Untag:  *2:10(SWI_IN_port14)  8:28  
        Tagged:  1:32(Billing-Core1) *2:8(fw03_port03)  8:12  

LIBRSS01:25 #

when i connect the cable, the ports on cisco and extreme switch are UP and linking

my pc is in an access port to vlan 128

from my pc, i cannot ping another pc in vlan 128 on extreme switch

[Reza Sharifi]

Is the issue resolved? I see you marked the treat as resolved.

If not where is the default gateway for the vlan 128?

If it is supposed to be on the extreme, did you turn on "ip forwarding" an the extreme box?

[zain_gabon]

Hi Reza,

the issue is not solve yet

The default gateway for vlan 128 is a firewall connected on extreme on a port in vlan 128

there is no ip address on vlan in extreme switch, then ip forwarding is not enable.

there is no ip address on cisco switch.

[Reza Sharifi]

Aha, now there is firewall too.

PC-------3750--------extreme------firewall

is that how you connect them together?

what is the ip address of the PC and what is its default gateway?

what is the status of vlan 128 and gi0/1

sh ip int bri vlan 128

sh ip int bri gi0/1

on the extreme port 1/32 is not active

is the extrem side also Gig?

  Tagged:  1:32(Billing-Core1) *2:8(fw03_port03)  8:12

[zain_gabon]

the pc ip is 192.168.5.120/24

gateway is 192.168.166 (fw ip)

vlan 128 and Gi0/1 are up

in extreme, the port 1:32 is fast

[zain_gabon]

Still not working,

may, i need to check the spanning tree

[zain_gabon]

Hi,

My problem was solve by enable Spanning-tree on the Extreme switches

Without the STP enable on Extreme switch, its cause a loop on the network.

Thanks to all