HP XP20000/XP24000 HP StorageWorks MPX200 Multifunction Router User Guide (569 - Page 131

FC switch requirements, IP network requirements, IP performance tuning

Page 131 highlights

FC switch requirements For additional B-series and C-series FC switches, local and remote MPX200 Multifunction Router pairs must be connected to the same Fibre Channel switch product line series. NOTE: The MPX200 Fibre Channel ports operate at 2, 4, and 8 Gb/s. IP network requirements HP requires that the following standards be met for the IP network: • Supported network protocols are TCP/IP IPv4 and IPv6 Ethernet 1,000 Mb/s. For minimum IP bandwidth requirements, see Storage system rules and guidelines, page 130. • For MPX200 IP data-Local and remote pairs are supported for up to 100 ms of IP network delay one-way, or 200 ms round-trip for HP Continuous Access. HP requires dedicated IP bandwidth (see Table 17). • For MPX200 IP management-LAN and WAN are supported. • For XP Continuous Access network requirements, see the SAN Extension chapter in the nl HP StorageWorks SAN Design Reference Guide. Table 17 Network requirements for the MPX200 with XCS and VCS Specification Bandwidth1 Maximum number of DR groups MTU of the IP network Maximum latency1 Average packet-loss ratio2 Description Must be dedicated to the HP Continuous Access storage replication Bandwidth function. There is no support for dynamic pacing of the gateway. See Table 16 for minimum supported bandwidth based on the average maximum number of DR groups packet-loss ratio and one-way intersite latencies. 1,500 bytes EVA: 100 ms one-way or 200 ms round-trip Low-loss network: 0.0012% average over 24 hours High-loss network: 0.2% average over 24 hours; must not exceed 0.5% for more than 5 minutes in a 2-hour window Latency jitter3 Must not exceed 10 ms over 24 hours. 1Pre-existing restriction 2A high packet-loss ratio indicates the need to retransmit data across the intersite link. Each retransmission delays transmissions queued behind the current packet, thus increasing the time to complete pending transactions. 3Latency jitter is the difference between the minimum and maximum values, and indicates how stable or predictable the network delay. The greater the jitter, the greater the variance in the delay, which lowers the performance predictability. IP performance tuning The MPX200 supports Fibre Channel service at transmission rates of 2 Gb/s, 4 Gb/s or 8 Gb/s with a maximum frame size of 2,148 bytes. It supports Ethernet service at transmission rates of 1,000 or MPX200 Multifunction Router User Guide 131

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FC switch requirements
For additional B-series and C-series FC switches, local and remote MPX200 Multifunction Router pairs
must be connected to the same Fibre Channel switch product line series.
NOTE:
The MPX200 Fibre Channel ports operate at 2, 4, and 8 Gb/s.
IP network requirements
HP requires that the following standards be met for the IP network:
Supported network protocols are TCP/IP IPv4 and IPv6 Ethernet 1,000 Mb/s.
For minimum IP bandwidth requirements, see
Storage system rules and guidelines
, page 130.
For MPX200 IP data
Local and remote pairs are supported for up to 100 ms of IP network delay
one-way, or 200 ms round-trip for HP Continuous Access. HP requires dedicated IP bandwidth
(see
Table 17
).
For MPX200 IP management
LAN and WAN are supported.
For XP Continuous Access network requirements, see the SAN Extension chapter in the
nl
HP StorageWorks SAN Design Reference Guide
.
Table 17 Network requirements for the MPX200 with XCS and VCS
Description
Specification
Must be dedicated to the HP Continuous Access storage replica-
tion Bandwidth function. There is no support for dynamic pacing
of the gateway.
Bandwidth
1
See
Table 16
for minimum supported bandwidth based on the
average maximum number of DR groups packet-loss ratio and
one-way intersite latencies.
Maximum number of DR groups
1,500 bytes
MTU of the IP network
EVA: 100 ms one-way or 200 ms round-trip
Maximum latency
1
Low-loss network: 0.0012% average over 24 hours
High-loss network: 0.2% average over 24 hours; must not exceed
0.5% for more than 5 minutes in a 2-hour window
Average packet-loss ratio
2
Must not exceed 10 ms over 24 hours.
Latency jitter
3
1
Pre-existing restriction
2
A high packet-loss ratio indicates the need to retransmit data across the intersite link. Each retransmission delays transmissions
queued behind the current packet, thus increasing the time to complete pending transactions.
3
Latency jitter is the difference between the minimum and maximum values, and indicates how stable or predictable the network
delay. The greater the jitter, the greater the variance in the delay, which lowers the performance predictability.
IP performance tuning
The MPX200 supports Fibre Channel service at transmission rates of 2 Gb/s, 4 Gb/s or 8 Gb/s with
a maximum frame size of 2,148 bytes. It supports Ethernet service at transmission rates of 1,000 or
MPX200 Multifunction Router User Guide
131