BRCD-FCIP-EXT-MIB

All MIBs › BRCD-FCIP-EXT-MIB

Organization: Brocade Communications Systems, Inc.

Last Updated: 2013-04-26

Category: Fibre Channel and Storage, Network Interfaces, Vendor: Foundry/Brocade

Description: Extends FCIP (Fibre Channel over IP) tunnel management for Brocade SAN and FCIP gateway devices.

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What Is BRCD-FCIP-EXT-MIB?

BRCD-FCIP-EXT-MIB is a Brocade Communications Systems MIB extending management of FCIP (Fibre Channel over IP) tunnels used in Brocade SAN extension products. It exposes per-link tunnel statistics such as TCP retransmits, dropped packets, compression efficiency, and round-trip timing rather than general system configuration. Its data is used to monitor the software/protocol health of extended SAN links -- tracking TCP retransmit counts, dropped packets, connection counts, and retransmission timeouts reveals a degrading or unstable WAN circuit carrying replicated storage traffic, effectively acting as an ongoing link-quality health check. It builds on standard interface indexing (ifIndex) conventions and is typically used alongside other Brocade Fibre Channel management MIBs. It is deployed on Brocade SAN extension switches and blades used for long-distance disk/tape replication and disaster-recovery links over IP WANs. Engineers can download the BRCD-FCIP-EXT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in BRCD-FCIP-EXT-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Brocade SAN extension switch
Brocade FCIP gateway/blade

Monitoring Examples

An admin polls fcipExtendedLinkTable (keyed by fcipExtendedLinkIfIndex) to watch fcipExtendedLinkTcpRetransmits and fcipExtendedLinkTcpDroppedPackets on an FCIP tunnel; a rising trend alongside growing fcipExtendedLinkTcpSmoothedRTT signals WAN congestion or a degrading circuit. fcipExtendedLinkCompressionRatio (derived from fcipExtendedLinkRawBytes vs fcipExtendedLinkCompressedBytes) shows how efficiently data is being compressed before transmission. fcipExtendedLinkConnectedCount and fcipExtendedLinkRtxRtxTO help an operator spot a flapping or unstable tunnel connection.

What Can Be Monitored

TCP retransmit count
dropped packet count
compression ratio
smoothed round-trip time
connected tunnel count
retransmission timeouts

Imported Objects

From Brocade-REG-MIB

bcsi	OBJECT-IDENTITY

From IF-MIB

InterfaceIndex

From INET-ADDRESS-MIB

InetAddress
InetAddressType
InetPortNumber

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
mib-2

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using fcipExtendedLinkTcpRetransmits OID:

Select a Brocade SAN extension switch/FCIP gateway as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type fcipExtendedLinkTcpRetransmits into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. It reports the number of segments retransmitted for the tunnel. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter64-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
fcipExtMIB	1.3.6.1.4.1.1588.4			The module defines management information specific to FCIP devices.
fcipExtendedLinkTable	1.3.6.1.4.1.1588.4.1		not-accessible	The stats of fcip tunnel compression, retransmission, packet loss, and latency details
fcipExtendedLinkEntry	1.3.6.1.4.1.1588.4.1.1		not-accessible	A conceptual row of the FCIP Extended Link Table containing additional stats.
NUM fcipExtendedLinkIfIndex	1.3.6.1.4.1.1588.4.1.1.1	InterfaceIndex	read-only	The ifIndex value of the virtual interface corresponding to the FCIP Tunnels running over TCP/IP.
C64 fcipExtendedLinkTcpRetransmitsEx	1.3.6.1.4.1.1588.4.1.1.2	Counter64	read-only	Number of segments retransmitted for the tunnel.
C64 fcipExtendedLinkTcpDroppedPackets	1.3.6.1.4.1.1588.4.1.1.3	Counter64	read-only	Number of TCP packets dropped in the tunnel. It is taken from TCPtransmits value.
BRC fcipExtendedLinkCompressionRatio	1.3.6.1.4.1.1588.4.1.1.4	BrcdCompressionRatio	read-only	Compression ratio of the tunnel in thousands.
I32 fcipExtendedLinkTcpSmoothedRTT	1.3.6.1.4.1.1588.4.1.1.5	Integer32	read-only	Round trip time (latency) in milliseconds for tunnel
C64 fcipExtendedLinkRawBytes	1.3.6.1.4.1.1588.4.1.1.6	Counter64	read-only	Total number of raw bytes sent or received for the tunnel.
C64 fcipExtendedLinkCompressedBytes	1.3.6.1.4.1.1588.4.1.1.7	Counter64	read-only	The total number of compressed bytes sent or received for the tunnel.
C64 fcipExtendedLinkConnectedCount	1.3.6.1.4.1.1588.4.1.1.8	Counter64	read-only	TCP session connection count for the tunnel.
C64 fcipExtendedLinkRtxRtxTO	1.3.6.1.4.1.1588.4.1.1.9	Counter64	read-only	Counter of retransmit packets due to timeout for the tunnel as Slow ReTx.
C64 fcipExtendedLinkRtxDupAck	1.3.6.1.4.1.1588.4.1.1.10	Counter64	read-only	Counter of retransmit packets due to duplicate acknowledgement for the tunnel as Fast ReTx.
C64 fcipExtendedLinkDupAck	1.3.6.1.4.1.1588.4.1.1.11	Counter64	read-only	Counter of duplicate acknowledgement packets for the tunnel.
I32 fcipExtendedLinkRtt	1.3.6.1.4.1.1588.4.1.1.12	Integer32	read-only	Round trip time in milliseconds for the tunnel.
C64 fcipExtendedLinkOoo	1.3.6.1.4.1.1588.4.1.1.13	Counter64	read-only	Counter of TCP out-of-order frames for the tunnel.
C64 fcipExtendedLinkSlowStarts	1.3.6.1.4.1.1588.4.1.1.14	Counter64	read-only	Counter of slow starts for the tunnel.
fcipConnStatsTable	1.3.6.1.4.1.1588.4.2		not-accessible	The stats of fcip tunnel compression, retransmission, packet loss, and latency details
fcipConnStatsEntry	1.3.6.1.4.1.1588.4.2.1		not-accessible	A conceptual row of the FCIP Extended Link Table containing additional stats.
OCT xfcipEntityId	1.3.6.1.4.1.1588.4.2.1.1	OCTET STRING	not-accessible	The FCIP entity identifier.
NUM xfcipLinkIfIndex	1.3.6.1.4.1.1588.4.2.1.2	InterfaceIndex	read-only	The ifIndex value of the virtual interface corresponding to the FCIP TCP sessions.
U32 xfcipLinkIndex	1.3.6.1.4.1.1588.4.2.1.3	Unsigned32	not-accessible	An arbitrary integer that uniquely identifies one FCIP link within an FCIP entity.
C64 xfcipExtendedLinkTcpRetransmits	1.3.6.1.4.1.1588.4.2.1.4	Counter64	read-only	Number of segments retransmitted.
C64 xfcipExtendedLinkTcpDroppedPackets	1.3.6.1.4.1.1588.4.2.1.5	Counter64	read-only	Number of TCP packets dropped
BRC xfcipExtendedLinkCompressionRatio	1.3.6.1.4.1.1588.4.2.1.6	BrcdCompressionRatio	read-only	Compression ratio in thousands.
I32 xfcipExtendedLinkTcpSmoothedRTT	1.3.6.1.4.1.1588.4.2.1.7	Integer32	read-only	Round trip time (latency) in milliseconds
C64 xfcipExtendedLinkRawBytes	1.3.6.1.4.1.1588.4.2.1.8	Counter64	read-only	Total number of raw bytes sent or received.
C64 xfcipExtendedLinkCompressedBytes	1.3.6.1.4.1.1588.4.2.1.9	Counter64	read-only	The total number of compressed bytes sent or received

RFC description

Manages Fibre Channel over IP (FCIP) tunnel compression, retransmission, packet loss, and latency metrics.

Start monitoring Brocade SAN extension switches/FCIP gateways with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download BRCD-FCIP-EXT-MIB