HP 5500 Ei 5500 Si Switch Series Configuration Guide

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How Smart Link works ··················\
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Smart Link collaboration mechanisms ··················\
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Smart Link configuration task list ··················\
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VRRP for IPv6 configuration task list ··················\
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Specifying the type of MAC addresses  mapped to virtual IPv6 addresses ··················\
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Creating a VRRP group and configuring a virtual IPv6 address ··················\
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Configuring router priority, preempt ive mode and tracking...

v 
Associating track with static routing ··················\
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Associating track with PBR (avail able only on the HP 5500 EI) ··················\
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Displaying and mainta ining track entries ··················\
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Track configuration...

1 
High availability overview 
Communication interruptions can seriously affect widely-deployed value-added services such as IPTV 
and video conference. Therefore, the basic network infrastructures must be able to provide high 
availability. 
The following are the effective ways to improve availability: 
•  Increasing fault tolerance  
•   Speeding up fault recovery  
•   Reducing impact of faults on services 
Availability requirements 
Availability requirements fall into three  levels based on purpose...

2 
High availability technologies 
Increasing MTBF or decreasing MTTR can enhance the availability of a network. The high availability 
technologies described in this section meet the level 2 and level 3 high availability requirements by 
decreasing MTTR. 
High availability technologies can be classified as fault detection technologies or protection switchover 
technologies. 
Fault detection technologies 
Fault detection technologies enable detection and di agnosis of network faults. CFD, DLDP, and...

3 
Technology Introduction Reference 
Track The track module is used to implement collaboration between 
different modules. The collaboration here involves three parts: the 
application modules, the track module, and the detection 
modules. These modules collaborate with one another through 
collaboration entries. That is, the detection modules trigger the 
application modules to perform certain operations through the 
track module. More specifically, the detection modules probe the 
link status, network...

4 
Technology Introduction Reference 
GR (available 
only on the HP 
5500 EI) Graceful Restart (GR) ensures the continuity of packet forwarding 
when a protocol, such as BGP, IS-IS, OSPF, IPv6 BGP, IPv6 IS-IS, 
or OSPFv3, restarts or during an active/standby switchover 
process. It needs other devices 
to implement routing information 
backup and recovery.  Layer 3—IP Routing 
Configuration 
Guide
/Configuration 
Guide of the 
corresponding 
protocols 
NSR (available 
only on the HP 
5500 EI)  Non-stop...

 5 
Configuring Ethernet OAM 
Ethernet OAM overview 
Ethernet Operation, Administration and Maintenance (OAM) is a tool that monitors Layer 2 link status 
and addresses common link-related issues on the last mile. You can use it to monitor the status of the 
point-to-point link between two directly connected devices.  
Major functions of Ethernet OAM 
Ethernet OAM provides the following functions: 
•   Link performance monitoring —Monitors the performance indices of a link, including packet loss, 
delay,...

 6 
Field Description 
Subtype The specific protocol being encapsulated in the Ethernet OAMPDU 
The value is 0x03. 
Flags 
Status information of an Ethernet OAM entity 
Code Type of the Ethernet OAMPDU 
 
 NOTE:  
Throughout this document, a port with Ethernet OA M enabled is an Ethernet OAM entity or an OAM 
entity. 
 
Table 5  Functions of different types of OAMPDUs 
OAMPDU t
ype Function 
Information OAMPDU  Used for transmitting state information of
 an Ethernet OAM entity—including the 
information...

 7 
Item Active Ethernet OAM mode Passive Ethernet OAM mode 
Transmitting Event Notification 
OAMPDUs  Available Available 
Transmitting Information 
OAMPDUs without any TLV Available Available 
Transmitting Loopback Control 
OAMPDUs Available Unavailable 
Responding to Loopback Control 
OAMPDUs Available—if both sides operate in 
active OAM mode 
Available 
 
 
NOTE:  
•  Only OAM entities operating in active OAM mode can initiate OAM connections. OAM entities 
operating in passive mode wait and respond...