attribute 26 9 251 "R3.3.3.200;255.255.255.255"Local definition of SSG Service “distlearn” 26 9 251 is Vendor Specific, Cisco, SSG Service Info Attributes defined herein: R: Destination Network, Specifies IP routes belonging to this ServiceCon...
· 采用normal模式填充:sub-option 2的内容是接收到DHCP客户端请求报文的接口MAC地址(DHCP中继)或设备的桥MAC地址(DHCP Snooping)。 · 采用sysname模式填充:sub-option 2的内容是设备的系统名称。设备的系统名称可以通过系统视图下的sysname命令配置。 1.6.3 Option 184 Option 184是RFC中规定的保留选项,用户可以自...
# Fixed IP addresses can also be specified for hosts. These addresses # should not also be listed as being available for dynamic assignment. # Hosts for which fixed IP addresses have been specified can boot using # BOOTP or DHCP. Hosts for which no fixed address is specified can only # b...
# sysname VTEP3 # dhcp enable # dhcp option82 vendor-specific format vendor-sub-option 2 ip-address 10.3.3.3 # ip vpn-instance vpn1 ipv4-family route-distinguisher 3:100 vpn-target 1:100 export-extcommunity evpn vpn-target 1:100 import-extcommunity evpn vxlan vni 100 # evpn vpn-instance ...
Static-bind used:表示此IP地址与MAC地址绑定且已使用。 Disable:表示此IP地址无法使用。 通过命令dhcp server excluded-ip-address(接口地址池)或excluded-ip-address(全局地址池)排除的IP地址是Disable状态。 Expired:表示此IP地址租期已过,处于空闲状态。
DHCP客户机初始化TCP/IP,通过UDP端口67向网络中发送一个DHCPDISCOVER广播包,请求租用IP地址。该 广播包中的源IP地址为0.0.0.0,目标IP地址为255.255.255.255;包中还包含客户机的MAC地址和计算机名。 DHCP回应的IP租用提供报文 任何接收到DHCPDISCOVER广播包并且能够提供IP地址的DHCP服务器,都会 通过UDP端口68给客户机回...
表-1是整个报文的封装格式,包括链路层头、IP头、UDP头和DHCP报文,其中dhcp主要的数据都封装在dhcp报文中。 表-2 是DHCP报文的格式,各字段的说明如下: Op:消息操作代码,1byte,既可以是引导请求(BOOTREQUEST)也可以是引导答复(BOOTREPLY),1为请求报文;2为响应报文。具体的报文类型在option字段中标识。
A PPP session belonging to a specific VPN is only allocated an address from the ODAP associated with that VPN. These PPP sessions are terminated on a Virtual Home Gateway (VHG)/PE router where the ODAP is configured. The VHG/PE router maps the remote user to the corresponding MPLS VPNs...
Otherwise, the DHCP server selects only the first matching secondary subnet for address allocation. If the network has more DHCP clients than the assignable IP addresses in the secondary subnet, not all DHCP clients can obtain IP addresses. IP address allocation sequence The DHCP server ...
}# Fixed IP addresses can also be specified for hosts. These addresses# should not also be listed as being available for dynamic assignment.# Hosts for which fixed IP addresses have been specified can boot using# BOOTP or DHCP. Hosts for which no fixed address is specified can only# be bo...