Cisco Systems IPMUX-1E operation manual Lease Length, Rate+User Untagged Mode

Chapter 1 IntroductionIPmux-1/1EInstallation and Operation Manual

Table 1-12. Rate+User Untagged Mode

Frame Action	Switch Action
A tagged frame enters the Network port
Both User and Network ports members of	Switched to User port*, and tag is removed
frame’s VLAN
Either the User or Network port is not a	Discarded
member of frames’s VLAN
A tagged frame enters the User port	Discarded
An untagged frame enters the Network port (see
Note 2)
Both User and Network ports are members of	Switched to User port without changing (see
port Network port default VLAN	Note 1)
Either User or Network port is not a member	Discarded
of the Network port default VLAN
A untagged frame enters the User port**
Both User and Network ports members of	Switched to Network port*
User port default VLAN	Subject to rate limiting
	Default User port VLAN ID is added with priority 0
Either User or Network port not member of	Discarded
User port default VLAN

Notes * The switch may decide not to pass the frame to the other port, based on its learning.

**A priority-tagged frame (frame with a tag and VLAN-ID 0) is treated just like an untagged frame. This includes rewriting the priority field with 0.

DHCP

Dynamic Host Configuration Protocol (DHCP) is a TCP/IP protocol that enables PCs and workstations to get temporary or permanent IP Addresses (out of a pool) from centrally administered servers.

DHCP is based on RFC 1531 and RFC 1533.

Lease Length

You can request an IP Address for an infinite period of time (Infinite Lease); however, you must accept the time period that is determined by the server, even if it is different from what you requested.

1-32 Functional Description