Difference between revisions of "CCNP 3 Implementing High Availability in a Campus Environment"
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|[[Image:ScreenShot418.jpg|800px|left|thumb|Standby takes over]] | |[[Image:ScreenShot418.jpg|800px|left|thumb|Standby takes over]] | ||
+ | |} | ||
+ | ==Describing HSRP== | ||
+ | An HSRP group consists of the following: | ||
+ | |||
+ | *Active router | ||
+ | *Standby router | ||
+ | *Virtual router | ||
+ | *Other routers | ||
+ | <br/><br/> | ||
+ | HSRP active and standby routers send hello messages to the multicast address 224.0.0.2 using UDP port 1985. | ||
+ | ==Identifying HSRP Operations== | ||
+ | {| | ||
+ | |[[Image:ScreenShot419.jpg|800px|left|thumb|HSRP operation]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot420.jpg|800px|left|thumb|HSRP operation]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot421.jpg|800px|left|thumb|HSRP operation]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot422.jpg|800px|left|thumb|HSRP operation]] | ||
+ | |} | ||
+ | ==Describing HSRP States== | ||
+ | {| | ||
+ | |[[Image:ScreenShot423.jpg|800px|left|thumb|HSRP States]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot424.jpg|800px|left|thumb|HSRP State Descriptions]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot425.jpg|800px|left|thumb|HSRP State Descriptions]] | ||
+ | |} | ||
+ | ==Describing HSRP Configuration Commands== | ||
+ | {| | ||
+ | |[[Image:ScreenShot426.jpg|800px|left|thumb|HSRP Configuration Commands]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot427.jpg|800px|left|thumb|HSRP Configuration Commands]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot428.jpg|800px|left|thumb|HSRP Configuration Commands]] | ||
+ | |} | ||
+ | =Optimizing HSRP= | ||
+ | ==Describing HSRP Optimization Options== | ||
+ | These options can be configured to optimize HSRP: | ||
+ | *Standby Priority | ||
+ | *Standby Preempt | ||
+ | *Message Timers | ||
+ | *Interface Tracking | ||
+ | {| | ||
+ | |[[Image:ScreenShot429.jpg|800px|left|thumb|HSRP Standby Priority]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot430.jpg|800px|left|thumb|HSRP Stanby Preempt]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot431.jpg|800px|left|thumb|HSRP Stanby Timers]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot432.jpg|800px|left|thumb|HSRP Tracking]] | ||
+ | |} | ||
+ | ===Configuration=== | ||
+ | {| | ||
+ | | | ||
+ | <source lang=cli> | ||
+ | interface vlan 10 | ||
+ | ip address 10.0.0.2 255.255.255.0 | ||
+ | standby 1 ip 10.0.0.1 | ||
+ | standby 1 priority 150 | ||
+ | standby 1 preempt | ||
+ | standby 1 preempt delay minimum 180 | ||
+ | standby 1 track GigabitEthernet 0/1 50 | ||
+ | standby 1 timers msec 200 msec 750 | ||
+ | </source> | ||
+ | || | ||
+ | <source lang=cli> | ||
+ | interface vlan 10 | ||
+ | ip address 10.0.0.3 255.255.255.0 | ||
+ | standby 1 ip 10.0.0.1 | ||
+ | standby 1 priority 100 | ||
+ | standby 1 preempt | ||
+ | standby 1 preempt delay minimum 180 | ||
+ | standby 1 track GigabitEthernet 0/1 50 | ||
+ | standby 1 timers msec 200 msec 750 | ||
+ | </source> | ||
+ | |} | ||
+ | |||
+ | ==Describing Load Sharing== | ||
+ | {| | ||
+ | |[[Image:ScreenShot433.jpg|800px|left|thumb|Multiple HSRP groups]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot434.jpg|800px|left|thumb|HSRP Load Balancing]] | ||
+ | |} | ||
+ | =Configuring Layer 3 Redundancy with VRRP and GLBP= | ||
+ | ==Describing Virtual Router Redundancy== | ||
+ | RFC 2338 | ||
+ | {| | ||
+ | |[[Image:ScreenShot435.jpg|800px|left|thumb|VRRP]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot436.jpg|800px|left|thumb|VRRP Operation]] | ||
+ | |} | ||
+ | ==Configuring VRRP== | ||
+ | {| | ||
+ | |[[Image:ScreenShot437.jpg|800px|left|thumb|Configure VRRP]] | ||
+ | |} | ||
+ | |||
+ | |||
+ | ==Describing GLBP== | ||
+ | {| | ||
+ | |[[Image:ScreenShot438.jpg|800px|left|thumb|GLBP]] | ||
+ | |} | ||
+ | '''Active virtual gateway (AVG'''): Members of a GLBP group elect one gateway to be the AVG for that group. Other group members provide backup for the AVG if the AVG becomes unavailable. The AVG assigns a virtual MAC address to each member of the group.<br/> | ||
+ | '''Active virtual forwarder (AVF)''': Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. These gateways are known as AVFs for their virtual MAC address.<br/> | ||
+ | '''Communication''': GLBP members communicate with each other using hello messages sent every 3 seconds to the multicast address 224.0.0.102, User Datagram Protocol (UDP) port 3222. | ||
+ | ==Identifying the GLBP Operations Process== | ||
+ | {| | ||
+ | |[[Image:ScreenShot439.jpg|800px|left|thumb|GLBP operations]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot440.jpg|800px|left|thumb|GLBP operations]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot441.jpg|800px|left|thumb|GLBP operations]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot442.jpg|800px|left|thumb|GLBP operations]] | ||
+ | |- | ||
+ | |[[Image:ScreenShot443.jpg|800px|left|thumb|GLBP Configuration]] | ||
|} | |} |
Latest revision as of 21:07, 2 February 2014
Contents
Configuring Layer 3 Redundancy with HSRP
Describing Routing Issues
Identifying the Router Redundancy Process
Describing HSRP
An HSRP group consists of the following:
- Active router
- Standby router
- Virtual router
- Other routers
HSRP active and standby routers send hello messages to the multicast address 224.0.0.2 using UDP port 1985.
Identifying HSRP Operations
Describing HSRP States
Describing HSRP Configuration Commands
Optimizing HSRP
Describing HSRP Optimization Options
These options can be configured to optimize HSRP:
- Standby Priority
- Standby Preempt
- Message Timers
- Interface Tracking
Configuration
interface vlan 10
ip address 10.0.0.2 255.255.255.0
standby 1 ip 10.0.0.1
standby 1 priority 150
standby 1 preempt
standby 1 preempt delay minimum 180
standby 1 track GigabitEthernet 0/1 50
standby 1 timers msec 200 msec 750 |
interface vlan 10
ip address 10.0.0.3 255.255.255.0
standby 1 ip 10.0.0.1
standby 1 priority 100
standby 1 preempt
standby 1 preempt delay minimum 180
standby 1 track GigabitEthernet 0/1 50
standby 1 timers msec 200 msec 750 |
Describing Load Sharing
Configuring Layer 3 Redundancy with VRRP and GLBP
Describing Virtual Router Redundancy
RFC 2338
Configuring VRRP
Describing GLBP
Active virtual gateway (AVG): Members of a GLBP group elect one gateway to be the AVG for that group. Other group members provide backup for the AVG if the AVG becomes unavailable. The AVG assigns a virtual MAC address to each member of the group.
Active virtual forwarder (AVF): Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. These gateways are known as AVFs for their virtual MAC address.
Communication: GLBP members communicate with each other using hello messages sent every 3 seconds to the multicast address 224.0.0.102, User Datagram Protocol (UDP) port 3222.