Related Documentation
- EX, M, MX Series
- Address-Assignment Pools Overview
- Configuring DHCP Client-Specific Attributes
- EX, M, MX, SRX, T Series
- dhcp-attributes (Address-Assignment Pools)
- M, MX Series
- Configuring Address-Assignment Pools
DHCP Attributes for Address-Assignment Pools
Table 1 describes the DHCP client attributes that you can use with the dhcp-attributes statement when you configure address-assignment pools. Table 2 describes the DHCPv6 client attributes for configuring IPv6 address-assignment pools.
Table 1: DHCP Attributes
Attribute | Description | DHCP Option |
|---|---|---|
Boot filename advertised to the client, and used by the client to complete configuration. | 67 | |
Boot server containing the boot file. | 66 | |
Domain in which clients search for a DHCP server host. | 15 | |
Grace period offered with the lease. | – | |
Maximum lease time allowed by the DHCP server. | 51 | |
IP address of DNS server to which clients can send DNS queries. | 6 | |
NetBIOS node type. | 46 | |
User-defined options. | – | |
Option 82 value is mapped to named address range. | – | |
IP address for routers on the subnetwork. | 3 | |
IP address used as the DHCP source address | 54 | |
Trivial File Transfer Protocol (TFTP) server that the client uses to obtain the client configuration file. | 150 | |
IP address of the Windows NetBIOS name server. | 44 |
Table 2: DHCPv6 Attributes
Attribute | Description | DHCPv6 Option |
|---|---|---|
IPv6 address of DNS server to which clients can send DNS queries. | 23 | |
Grace period offered with the lease. | – | |
Maximum lease time allowed by the DHCP server. | – | |
User-defined options. | – | |
Length of time, in seconds, that the DHCP server keeps the IPv6 prefix active. The DHCPv6 server sends this attribute to the client (router). | – | |
IPv6 address of SIP outbound proxy server. | 22 | |
Domain name of the SIP outbound proxy server. | 21 | |
Timer that, when it expires, the client (router) sends a request to the originating DHCP server requesting its lease (IP configuration) to be extended. If the lease period is limitless, the client's lease never expires and no request is required. However, because most leases are time-limited, the router monitors this timer and sends a request to the originating DHCP server to ensure that its lease is extended and normal operation continues. T1-percentage is specified as a percentage of the elapsed time for the preferred-lifetime value. This value is sent from the DHCP server to the router. | – | |
Timer that, when it expires, the client (router) sends a request to any available DHCP server requesting its lease (IP configuration) to be extended. T2-percentage is sent from the DHCP server to the router. You specify t2-percentage as a percentage of the value of preferred-lifetime. | – | |
Length of time, in seconds, that the DHCP server keeps the IPv6 prefix valid. | – |
Related Documentation
- EX, M, MX Series
- Address-Assignment Pools Overview
- Configuring DHCP Client-Specific Attributes
- EX, M, MX, SRX, T Series
- dhcp-attributes (Address-Assignment Pools)
- M, MX Series
- Configuring Address-Assignment Pools
Published: 2013-02-21
Related Documentation
- EX, M, MX Series
- Address-Assignment Pools Overview
- Configuring DHCP Client-Specific Attributes
- EX, M, MX, SRX, T Series
- dhcp-attributes (Address-Assignment Pools)
- M, MX Series
- Configuring Address-Assignment Pools
