How to configure a cisco 2960 switch to support two routers(data and voice), please give me any suggestions

HI, I need to configure a 2960 switch at a client site. They have routers already been installed on site, one is for data traffic another is for voice. I have created two vlans on switch  for data and voice. Now I couldn't get any idea what would be the default gateway on switch. 
Please give me any suggestions.

HI Leo, 
            Many thanks for your reply.
         But there are two up-links going from Gi 0/1 and Gi 0/2. I have configured the S/W like below, 
interface GigabitEthernet0/1
description UPLINK TO Data router
switchport access vlan 100
 switchport mode access
interface GigabitEthernet0/2
description UPLINK TO voice router
switchport access vlan 100
 switchport mode access
interface Vlan1
 no ip address
 no ip route-cache
 shutdown
interface Vlan60
 ip address 192.168.1.253 255.255.255.0
 ip helper address 192.168.1.1
 no ip route-cache
interface Vlan100
 ip address 172.16.1.253 255.255.255.0
 ip helper address 172.16.1.1
 no ip route-cache
 I have used IP helper address, but I am getting some connecting issues on PCs and IP phones. Please suggest me, Can I manage it with two uplinks with different IP addresses. 
Thanks in advance.

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    interface range ethernet g(1-4)
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    interface range ethernet e(21-24)
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    interface range ethernet g(1-4)
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    interface range ethernet e(1-20)
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    interface range ethernet g(1-4)
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    interface range ethernet g(1-4)
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    voice vlan enable
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    interface ethernet e5
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    voice vlan cos mode all
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    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    interface ethernet e20
    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    interface ethernet e21
    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    interface ethernet e22
    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    interface ethernet e23
    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    interface ethernet e24
    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    lldp optional-tlv port-desc sys-name sys-desc sys-cap 802.3-mac-phy 802.3-lag 802.3-max-frame-size
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    interface ethernet e1
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    interface ethernet e2
    lldp med notifications topology-change enable
    exit
    interface ethernet e3
    lldp med notifications topology-change enable
    exit
    interface ethernet e4
    lldp med notifications topology-change enable
    exit
    interface ethernet e5
    lldp med notifications topology-change enable
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    interface ethernet e6
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    exit
    interface ethernet e7
    lldp med notifications topology-change enable
    exit
    interface ethernet e8
    lldp med notifications topology-change enable
    exit
    interface ethernet e9
    lldp med notifications topology-change enable
    exit
    interface ethernet e10
    lldp med notifications topology-change enable
    exit
    interface ethernet e11
    lldp med notifications topology-change enable
    exit
    interface ethernet e12
    lldp med notifications topology-change enable
    exit
    interface ethernet e13
    lldp med notifications topology-change enable
    exit
    interface ethernet e14
    lldp med notifications topology-change enable
    exit
    interface ethernet e15
    lldp med notifications topology-change enable
    exit
    interface ethernet e16
    lldp med notifications topology-change enable
    exit
    interface ethernet e17
    lldp med notifications topology-change enable
    exit
    interface ethernet e18
    lldp med notifications topology-change enable
    exit
    interface ethernet e19
    lldp med notifications topology-change enable
    exit
    interface ethernet e20
    lldp med notifications topology-change enable
    exit
    interface ethernet e21
    lldp med notifications topology-change enable
    exit
    interface ethernet e22
    lldp med notifications topology-change enable
    exit
    interface ethernet e1
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e2
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e3
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e4
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e5
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e6
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e7
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e8
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e9
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e10
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e11
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e12
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e13
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e14
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e15
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e16
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e17
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e18
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e19
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e20
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e21
    lldp med enable network-policy poe-pse
    exit
    interface ethernet e22
    lldp med enable network-policy poe-pse
    exit
    lldp med network-policy 1 voice vlan 111 vlan-type tagged
    interface range ethernet e(1-22)
    lldp med network-policy add 1
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    ip default-gateway 199.16.30.3
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    bonjour service enable https 
    bonjour service enable ssh   
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    line ssh
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    line telnet
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    ip http authentication tacacs local
    ip https authentication tacacs local
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    aaa authentication login SSH tacacs local
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    login authentication Telnet
    enable authentication Telnet
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    login authentication SSH
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    Wanlucg wrote:
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