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电梯直达

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发表于 2003-02-13 11:47 |只看该作者 |倒序浏览

这是2900的配置:

Using 1511 out of 32768 bytes
!
version 12.0
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname SGZVOICE21
!
enable secret 5 $1$E1DC$gsEcnPHRfMcLX1v1GF07N/
!
!
!
!
!
!
ip subnet-zero
!
!
!
interface FastEthernet0/1
duplex half
speed 10
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface VLAN1
ip address 192.168.107.121 255.255.255.0
no ip directed-broadcast
no ip route-cache
!
interface VLAN2
no ip directed-broadcast
no ip route-cache
shutdown
!
ip default-gateway 192.168.107.213
snmp-server engineID local 0000000902000006D7813580
snmp-server community private RW
snmp-server community public RO
!
line con 0
transport input none
stopbits 1
line vty 0 4
password password
login
line vty 5 15
password password
login
!
end
我的voip设备接在2900的第一口,走vlan2
这台2900上联3550通过光纤接到机房,机房里有三台2950,上面接的voip设备走vlan2都可以用了,另外一个地方也有一套2950上联3550通过光纤接到机房,这个2950上的voip设备也走vlan2可以使用没问题.
我不明白为什么2900上就不行?是否有些地方和2950不一样?

现在我的电脑在2900上可以ping到我的dhcp server,但是2900上的voip设备就是不能从dhcp server获得ip address,这是为什么呢?
我试过在vlan 2中作ip help-address指向我的dhcp server也不行.我其它的2950上也没做这个.

真是伤脑筋,请各位帮帮忙,我已经被这个问题困扰好些天了?

VLAN, VLAN