12-10-2007 03:49 AM - edited 03-05-2019 07:54 PM
Hi,
I created extended vlan 1600 and 1700.
Now I cannot ping to a host in vlan 1700.
I created ip addresses on the vlan but it is still not working
please assist
Jorg
12-10-2007 04:05 AM
there ia an exception with extended vlan
that it would work only with vtp transparent mode
have the verified vtp mode ?
12-10-2007 04:08 AM
yep,
I already checked it. In vlan 1600, the hosts can reach other vlans in vlan 1700 it is not possible, seems that it is only routed through the default route, nothing else is possible
sh vtp status
VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 1005
Number of existing VLANs : 6
VTP Operating Mode : Transparent
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xA1 0xB1 0xB8 0x32 0x13 0x9B 0x3D 0xEB
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
12-10-2007 04:19 AM
just to understand, you've created a vlan 1700 on your switch and the hosts are not reachable from this switch?
If this is the case, do your router have a VLAN1700? Is vlan 1700 passed between your switch and router? (added in the trunk?) Does your switch have a default-geteway configured?
Check the following:
show int [int going to your router] trunk
show run int [int going to your router]
and on your router:
show run int [int going to your switch].1700
and if possible, post the results.
Regards
[rate any helpful posts]
12-10-2007 04:25 AM
yep that is correct,
But i'm further into troubleshooting now.
There a 2 sites site a en site b
in site b there are a couple of extende vlans beginning with 16xx and 17xx. Now the 16xx vlans can reach site a and internal in site b.
But vlan 1700 is not route through site b.
Sorry for the incorrect thing above. I first thought it was an extended vlan problem. It seems that it is not route correctly.
Vlan 17xx ip addresses are 172.17.x.x and site a ip addresses are 172.18.x.x /16
I configured a route
ip route 172.18.0.0 255.255.0.0 via the wan router which is in a range of some vlan 16xx with ip 172.16.10.x
the port connected to the other router is an access port in vlan 1610. It seems it is not working
Best regards
12-10-2007 04:51 AM
Do each site have its own router?
If yes, you need to use trunk between your switch and this router. Configure vlan 1700 on this router by creating a subinterface(s) [for each vlan that want to pass between switch and router] on this router, for example:
int fa0/0.1700
encapsulation dot1Q 2010
ip address [range of this VLAN]
and your switch's config shold look like this:
int [int going to this site router]
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 1600,1700 ...
At this moment, you should be able to ping VLAN1700 users from your router, and if your switch has ip default-gateway configured, you should ping VLAN1700s users from here as well.
Then, on the another site, configure
"ip route [vlan 1700 range] next-hop-router".
Remember, your users from vlan1700 have to use ip address of int fa0/0.1700 as a default-gateway.
If you don't have a router on each site, please provide more information about your architecture.
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