Intervlan路由--DHCP在默认VLAN情况下从服务器提供，而不是通过第三层交换机返回新创建的vlan

Question

默认VLAN: 10.36.0.0/24新VLAN : 10.36.8.0/24 DHCP服务器: 10.36.0.17

我可以看到DHCP提供包，使其返回到我的VLAN ip地址，即10.36.8.31 (来自dhcp服务器消息日志)

4月28日15:33:13 dhcpd: DHCPOFFER 10.36.8.129至via 10.36.8.31

然而，dhcp提供的永远不会回到我的机器连接到新的vlan(也验证了wireshark )。

该开关为HP第3层方案。

运行-Config(修改了一些细节)

Running configuration:

*; J9588A Configuration Editor; Created on release #KA.15.17.0008



*module 1 type j9588y

 module 2 type j9588x

-fault-finder broadcast-storm sensitivity high

fault-finder bad-driver sensitivity high

fault-finder bad-transceiver sensitivity high

fault-finder bad-cable sensitivity high

fault-finder too-long-cable sensitivity high

fault-finder over-bandwidth sensitivity high

fault-finder loss-of-link sensitivity high

fault-finder duplex-mismatch-hdx sensitivity high

fault-finder duplex-mismatch-fdx sensitivity high

fault-finder link-flap sensitivity high

jumbo ip-mtu 9000

power-over-ethernet redundancy n+1

qos tcp-port ipv4 22 priority 7

qos tcp-port ipv4 80 priority 1

qos tcp-port ipv4 443 priority 0

qos type-of-service diff-services

timesync sntp

sntp broadcast

sntp server priority 1 10.36.0.17

sntp server priority 2 10.36.0.18

no telnet-server

time daylight-time-rule western-europe

no web-management

web-management ssl

ip default-gateway 10.36.0.1

ip dns server-address priority 1 10.36.0.17

ip dns server-address priority 2 10.36.0.17

no ip ssh cipher aes128-cbc

no ip ssh cipher 3des-cbc

no ip ssh cipher aes192-cbc

no ip ssh cipher aes256-cbc

no ip ssh mac hmac-md5

no ip ssh mac hmac-sha1-96

no ip ssh mac hmac-md5-96

ip route 10.36.8.0 255.255.255.0 10.36.8.1

ip routing

snmp-server community "public" unrestricted

tls application web-ssl lowest-version tls1.2

tls application openflow lowest-version tls1.2

tls application syslog lowest-version tls1.2

tls application tr69 lowest-version tls1.2

aaa authentication ssh login public-key

oobm

   ip address 10.36.0.35 255.255.255.0

   exit

router rip

redistribute connected

   exit

vlan 1

   name "DEFAULT_VLAN"

   no untagged 20-21

   untagged 1-19,22-52

   ip address 10.36.0.31 255.255.255.0

   ip helper-address 10.36.0.17

   ip igmp

   exit

vlan 8

   name "WiredUsers"

   untagged 20

   ip address 10.36.8.31 255.255.255.0

   ip helper-address 10.36.0.17

   ip igmp

   exit

spanning-tree

对于DHCP为什么不能从10.36.8.31跳到同一子网上的机器，有什么建议吗？

Answer 1

我认为您可能不需要为10.36.8.0/24网络定义明确的路由，因为它是一个直接连接的网络。尝试删除该路由语句，然后查看路由表，看看是否有显示为直接连接或类似的10.36.8.0的路由。我不熟悉惠普交换机，所以我的基础是我的知识与思科交换机的VLAN间路由。然后查看您的DHCP客户端是否获得指定的ip地址。

这是思科3560交换机的输出。您将看到，我的VLAN没有显式定义的路由语句，因为它们都是直接连接的。

Switch#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/16 is subnetted, 4 subnets
C       10.1.0.0 is directly connected, Vlan10
C       10.2.0.0 is directly connected, Vlan20
C       10.3.0.0 is directly connected, Vlan30
C       10.4.0.0 is directly connected, Vlan40

Switch#sh run
Building configuration...

Current configuration : 1504 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
ip routing
!
!
!
!
!
!
!
!
!
!
no spanning-tree vlan 1,10,20,30,40
!
!
!
!
interface FastEthernet0/1
 switchport access vlan 10
 switchport mode access
!
interface FastEthernet0/2
 switchport access vlan 20
 switchport mode access
!
interface FastEthernet0/3
 switchport access vlan 30
 switchport mode access
!
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 access vlan 40
 switchport mode access
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan10
 ip address 10.1.0.1 255.255.0.0
!
interface Vlan20
 ip address 10.2.0.1 255.255.0.0
!
interface Vlan30
 ip address 10.3.0.1 255.255.0.0
!
interface Vlan40
 ip address 10.4.0.1 255.255.0.0
!
ip classless
!
!
!
!
!
!
!
line con 0
line vty 0 4
 login
!
!
!
end


Switch#