09-07-2006 08:56 AM - edited 03-03-2019 04:51 AM
Hi:
I have a problem with my VLAN connection to the Internet,below was my list of configurations and topology attach:
Gateway_Router
Fa 0/0: ip address 10.200.1.1 /16
3750_Switch:DOMAIN: smartport
VLAN 1 : ip address 10.200.7.13 /16
ip default-gateway: 10.200.1.1
3560_Switch:DOMAIN: cisco
ip routing enable
ip default-gateway: 10.200.1.1
VLAN 1 : ip address 10.200.22.254 /16
VLAN 10: ip address 10.201.0.254 /16
Fa 0/1 : switchport access VLAN1
Fa 0/5 : switchport access VLAN10
VLAN1 host:
ip address : 10.200.9.3 /16
gateway : 10.200.22.254
VLAN10 host:
ip address : 10.201.9.5 /16
gateway : 10.201.0.254
* If i use 10.200.22.254 as gateway I can ping VLAN 10 and 10.200.1.1 but i can't connect to the internet.
* If i use 10.200.1.1 as gateway I can't ping VLAN 10 but i can connect to the internet.
* VLAN 10 can't ping 10.200.1.1 and also can't connect to the internet.
Where did i make a mistake?
I really need an advice for this, What will i change or add to my configurations for this to work out my network?
Thanks in Advance
Cliff
09-07-2006 09:19 AM
Cliff
In the 3560 you have enabled IP routing to take advantage of its capability as a layer 3 switch. To do routing it needs a default route. Note that the ip default-gateway that you have configured does not provide a default route. I would suggest configuring on the 3560 ip route 0.0.0.0 0.0.0.0 10.200.1.1. This should fix the problem with vlan 10 since it will provide a route to outside.
HTH
Rick
09-07-2006 09:20 AM
Hi,
Points to note:
the command ip default-gateway should only be used when ip routing is disabled on the Cisco router.
Hence on your 3560 switch, you should have the ip route command as follows
ip route 0.0.0.0 0.0.0.0 10.200.1.1
For the hosts connected under this switch, configure the default gateway as 10.200.22.254 for vlan 1 hosts.
Configure the default gateway as
10.201.0.254 for vlan 10 hosts.
Finally in your Gateway router, you should also be having a return route for the vlan 10 network as follows.
ip route 10.201.0.0 255.255.0.0 10.200.22.254.
Also ensure that you have properly configured the Nat in your gateway router to have the internet reachability from the subnets 10.200.0.0/16 and 10.201.0.0/16.
Hope this helps. Rate the post if you find it helpfull
-VJ
09-08-2006 12:12 AM
Hi VJ
First I really to thank you for your advice, it really solves my problem, now i can ping 10.201.0.254 (VLAN10) and 10.200.22.1(VLAN1) (previously 10.200.22.254)from my gateway router, now VLAN1 hosts can now access the internet using 10.200.22.1 ip address, but VLAN10 hosts still can't access the internet and upon checking the router ACLs config i found that 10.201.0.0 is not on the existing (ACLs 10 and ACLs 110) ACLs for permition.
Can i add another ACLs eg; access-list 20 and correct me if am wrong will i apply it to the outbound,eg;ip access-group 20 out.
thanks
cliff
09-07-2006 09:39 AM
how your both the switches connectd with the router...
will you tell me how your switch connected with you gateway router... i mean ip address of the switch port which is connected with the router...
regards
Devang
09-07-2006 10:56 AM
Cliff,
I see one possible problem here. Given the fact, you are having Internet connectivity the problem isn't NAT related. Can you configure the 'no ip redirect' command on the following interfaces and check the status. Also, make sure there's a default route (not gateway command) on the 3560 pointing to 10.200.1.1.
Gateway_Router:
int f0/0
no ip redirects
3560_switch:
int vlan 10
no ip redirects
int vlan 20
no ip redirects
HTH
Sundar
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide