Chapter 1 Getting to Know Your MSC
Management Switch Card User’s Guide
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The first management switch card installed is active. If both management switch cards are installed
at the same time, the management switch card in the lower numbered slot is active. Whenever the
active management switch card cannot operate (whether it is removed, restarts or crashes), the
standby management switch card becomes active.
Gigabit Ethernet Ports
The Gigabit Ethernet ports allow the switch to connect to another WAN switch or daisy-chain to
other switches.
SFP Slots
Install SFP (Small Form-factor Pluggable) transceivers in these slots to connect to other Ethernet
switches at longer distances than the Ethernet port.
XFP Slots
Install XFP (10 Gigabit Small Form-factor Pluggable) hot-swappable optical transceivers in these
slots for 10 Gigabit Ethernet connections.
SFP+ Slots
Install SFP+ (10 Gigabit Small Form-factor Pluggable) hot-swappable optical transceivers in these
slots for 10 Gigabit Ethernet connections.
Console Port
Use the console port for local management.
DHCP Relay
DHCP (Dynamic Host Configuration Protocol RFC 2131 and RFC 2132) allows individual computers
to obtain TCP/IP configuration at start-up from a server. You can configure the system as a DHCP
relay agent to have another DHCP server provide TCP/IP configuration for the clients. In addition,
you can set the system to forward client DHCP requests to specific DHCP servers based on the VLAN
ID. You can also specify up to two DHCP servers for each VLAN to provide fail-over protection.
DHCP Relay Option82
The system supports DHCP relay agent82 (RFC 3046) that adds additional information to client
DHCP requests that the MSC relays to a DHCP server. It also supports adding the sub-option 2
(Remote ID) with additional information.
DHCP Snooping
DHCP snooping allows the system to identify packets with DHCP server assigned IP address(es) and
block access of devices using unknown IP addresses on a subscriber port. You can also manually
add static IP addresses to the DHCP snooping table.
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