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Cisco 3750 switch cannot route across vlans

Hey there,

I have three cisco 3750 switches configured in switch stack with 2 vlans (one voice, one data) on a network with about 9 vlans.  The issues I'm having is that the users from 172.16.9.x network cannot contact the phone server on 192.168.10.x network.  Packets are hitting the swith but everything is being sent out the gateway including phone server packets.  I have setup port monitoring and changed the users gateway to the switch and still no luck.  Is there some way to accomplish this without a third party device (router or firewall)?  Is some kind of trunkng possible?  I can post the configs if you need them.  Please help!  thanks.

static route:  
 The switch IP is : 172.16.1.2  
The switches gate:  172.16.1.1

Users are on 172.16.9.x
IP phone system in on 192.168.10x
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metalfubar
Asked:
metalfubar
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2 Solutions
 
ryan80Commented:
did you put in

ip routing

to enable routing?
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raeldriCommented:
like ryan mentioned is ip routing enabled. you mentioned the 3750 has 2 vlans does it know how to reach the other vlans?

ip route 192.168.10.0 255.255.255.0 (router/switch IP to reach network)
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abhishek1986Commented:
In configuration mode, apply the command to apply routing
Cisco3750(config)# ip routing

Then check if the show ip route command shows all the VLans in the routing table
Cisco3750# show ip route
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metalfubarAuthor Commented:
so if I type ip show ip route it displays only my vlans on the switch (192.168.10.0/24 and 172.16.0.0/12.  Does this cover all vlans?  if not, can i add them invidividually somehow?

thx
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ryan80Commented:
You are just using the subnet of 172.16.0.0/12? Even on the computers?
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raeldriCommented:
the switch doesnt need to be aware of all Vlans but its default route should be or they need to be manually defined.
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metalfubarAuthor Commented:
does the gateway of the phone vlan need to be included here?  what about a static route to 172.16.9.x for the users?

ryan:  yes 172.16.0.0/12 for all subnets except the 192.168.10.x.
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raeldriCommented:
the switchgateway (172.16.1.1) should know how to reach the 192.168.10.0 network if it doesn't. you need to add a route to the switch with a next hop address that will get it closer to the 192.168.10.0 network. the 192.168.10.0 network also needs to know how to get back to the 172.16.x.x networks. do you have a network map you can share so we can provide additional input
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metalfubarAuthor Commented:
actaully yes, the switch vlans are communicating and can ping each other fine.  192.168.x - 172.16.x.  so yeah, if a user on 172.16.9.x tries to connect their ip phone 192.168.10.x it does not work.  when typing:

ip route 192.168.10.0 255.255.255.0

I do get an invalid input error detected.
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ryan80Commented:
you need to put in the gateway ip address for the ip route command.
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abhishek1986Commented:
You need not give any routes for this communication.
If the two VLANs are attached to the same switch, they will be communicating.
Just check in switch the output of
Cisco3750# show ip route
If it shows you two connected networks, namely, the 172.15. Network and the 192.168. Network and a Default route, 0.0.0.0/0 via x.x.x.x, then all are fine.
In show run, do you see, IP routing enabled.

Follow this link for more clarification:
http://www.cisco.com/en/US/tech/tk389/tk815/technologies_configuration_example09186a008015f17a.shtml
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