Netgear RPS4000-200NES Datasheet download pdf (Page 13)

UDLD Support

UDLD implementation detects unidirectional links

physical ports (UDLD must be enabled on both sides

of the link in order to detect an unidirectional link

• UDLD protocol operates by exchanging packets containing information about neighboring devices

• The purpose is to detect and avoid unidirectional link forwarding anomalies in a Layer 2 communication

channel

Both “normal-mode” and “aggressive-mode” are supported for perfect compatibility with other vendors implementations, including port “D-Disable triggering cases in

both modes

Datacenter Features (CLI only)

The Priority Flow Control (PFC) is standardized by the

IEEE 802.1Qbb speciﬁcation and enables ﬂow control

per trac class on IEEE 802 full-duplex links

• By pausing congested priorities independently, highly loss sensitive protocols can share the same link with

trac that has dierent loss tolerances

• The priorities are dierentiated by the priority ﬁeld of the 802.1Q VLAN header

• PFC uses a new control packet deﬁned in 802.1Qbb and therefore disables 802.3x standard ﬂow control

on PFC conﬁgured interfaces

The Data Center Bridging Exchange Protocol (DCBX)

is used by DCB devices to exchange conﬁguration

information with directly connected peers

• The protocol is also used to detect misconﬁguration of the peer DCB devices and optionally, for conﬁgura-

tion of peer DCB devices

• DCBX is deployed in support of lossless operation for FCoE or ISCSI trac when all network elements in

FCoE topologies are DCBX enabled

• M6100 automatically detects if a peer is operating with either of the two DCBX versions (the CEE DCBX

and the IEEE standard DCBX) by default

• DCBX protocol supports the propagation of received conﬁguration information for the following

features:

- Enhanced Transmission Selection (ETS)

- Priority-based Flow Control (PFC)

- Application Priorities

Enhanced Transmission Selection (ETS) provides an

operational model for priority processing and band-

width allocation for the switch in a DCB environment

• Using priority-based processing and bandwidth allocations, dierent Trac Class Groups (TCGs) within

dierent types of trac such as LAN, SAN and Management can be conﬁgured to provide bandwidth

allocation or best eort transmit characteristics

• CoS information is exchanged with peer DCBX devices using ETS TLVs

• As part of the transmitted ETS TLVs, by default, DCBX advertises the following parameters on per

port basis:

- Mapping between ingress ports 802.1p priority to Trac Class Group (TCG)

- Bandwidth percentage (weight percentage) of each Trac Class Group

- Scheduling algorithm for each Trac Class Group

• ETS TLVs are accepted from auto-upstream devices and propagated to auto-downstream devices

• ETS may be conﬁgured on a port in manual mode and M6100 switch may become the source for ETS

conﬁguration in the network

The FCoE Initialization Protocol (FIP) is used to

perform the functions of FC_BB_E device discovery,

initialization and maintenance

• FIP uses a separate EtherType from FCoE to enable the distinction of discovery, initialization, and

maintenance trac from other FCoE trac

• FIP frames are standard Ethernet size (1518 Byte 802.1q frame) whereas FCoE frames are a maximum of

2240 bytes

The FIP snooping capability is a frame inspection

method used by FIP Snooping Bridges to monitor

FIP frames and apply policies based upon the L2

header information in those frames, following the

recommendations in Annex C of FC_BB_5 Rev 2.00

and supporting these features:

• Auto-conﬁguration of Ethernet ACLs based on information in the Ethernet headers of FIP frames

• Emulation of FC point-to-point links within the DCB Ethernet network

• Enhanced FCoE security/robustness by preventing FCoE MAC spooﬁng

The FIP Snooping Bridge solution in M6100 supports

the interior port role, the perimeter port role and the

FCF-facing port role and is intended for use at the

edge or the interior of the switched network

• Perimeter or Edge port (connected directly to ENode)

• FCF facing port (that receives trac from FCFs targeted to the Enodes)

ProSAFE® LAN Access and Aggregation Chassis Switches Data Sheet

M6100 series

Page 13 of 46

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 45 46

Comments to this Manuals

No comments

Netgear RPS4000-200NES Datasheet Page 13

Comments to this Manuals