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Illustrated network: what is gateway load balancing protocol GLBP?
2022-07-04 23:35:00 【InfoQ】
- Graphic network : What is Virtual Router Redundancy Protocol VRRP?
- Graphic network : What is the hot backup router protocol HSRP?
Catalog
What is? GLBP?
- English full name :
Gateway Load Balancing Protocol
- Chinese name :Gateway load balancing protocol
- Cisco proper
- from Cisco Systems On 2005 Created in
- Provide redundancy 、 Load balancing
- GLBP stay UDP( port3222) Work on , That is to sayapplication layer
- GLBP It's something like HSRP and VRRP OfVirtual gateway protocol
- And HSRP or VRRP Different , It will not increase any management burden
GLBP advantage
- Route traffic to a single gateway , Share equally among multiple routers
- Load balancing: Multiple devices can share information from LAN Client traffic , Thus, the traffic load is more evenly distributed among available devices .
- Provide automatic rerouting in case of any failure
- Multiple virtual devices:GLBP Support at most on each physical interface of the router 1024 A virtual router (GLBP Group ), Each group supports up to 4 Virtual Forwarders .
- Authentication:GLBP Use MD5 Algorithm to improve reliability 、 Security and attempts to cheat GLBP Protocol software protection .
- Allow full use of resources on all devices , Without the administrative burden of creating multiple groups
GLBP role
AVG
- English full name :
Active Virtual Gateway
- Chinese name :Active virtual gateway
AVF
- English full name :
Active Virtual Forwarder
- Chinese name :Active virtual forwarder
GLBP Load balancing algorithm
Round-Robin
Host-dependent
Weighted
GLBP state
AVG Six states
- Disabled: Indicates that virtual is not configured IP Address
- Initial: Represent virtual IP Address configured , But the virtual gateway configuration is incomplete
- Listen: Indicates that the virtual gateway is receiving hello Data packets , And be prepared to change to... When the active or standby virtual gateway is unavailable “Speak” state .
- Speak: Indicates that the virtual gateway is trying to become AVG
- Standby: Ready to be the next AVG
- Active: Indicates that this gateway is AVG, And it is responsible for responding to virtual IP Address of the ARP request
AVF Four kinds of state
- Disabled: Indicates that no virtual is assigned MAC Address
- Initial: Represent virtual MAC The address is normal , But the virtual forwarder configuration is incomplete
- Listen: Virtual forwarder is receiving hello Data packets , If AVF Unavailable , Is ready to change to “Active” state .
- Active: Indicates that the gateway is AVF, Be responsible for forwarding to the virtual forwarder MAC Address message
GLBP timer
Hold timer
Redirect timer
Secondary hold timer
HSRP、VRRP、GLBP Comparison between the three
1、 meaning
- HSRP:HSRP-Hot Standby Redundancy, Gateway load balancing protocol
- VRRP:Gateway Load Balancing Protocol, Virtual router redundancy protocol
- GLBP:Virtual Router Redundancy Protocol, Global load balancing Protocol
2、 Range
- HSRP: Cisco proprietary
- VRRP:IEEE standard
- GLBP: Cisco proprietary
3、 standard
- HSRP:RFC2281
- VRRP:RFC3768
- GLBP: nothing
4、OSI layer
- HSRP: The first 3 layer
- VRRP: The first 3 layer
- GLBP: The first 2 layer
5、 Whether load balancing is supported
- HSRP: I won't support it
- VRRP: I won't support it
- GLBP: Support
6、 Multicast group IP Address
- HSRP:HSRP edition 1 Use multicast IP Address
224.0.0.2
, edition 2 Use224.0.0.102
- VRRP:
224.0.0.18
- GLBP:
224.0.0.102
7、 Transmission port number
- HSRP:UDP1985
- VRRP:UDP112
- GLBP:UDP3222
8、 Whether preemption is enabled by default
- HSRP: Preemption is not enabled by default
- VRRP: Preemption is enabled by default
- GLBP: By default ,GLBP Preemption is disabled , however , This function can be enabled manually
9、 The election
- HSRP:
- Highest priority
- The highest IP Address
- VRRP: I won't support it
- Highest priority
- The highest IP
- GLBP: Support
- Highest priority
- The highest IP
10、IPv6 Support
- HSRP: Support
- VRRP: I won't support it
- GLBP: Support
11、 authentication
- HSRP: Support plain text and MD5 authentication
- VRRP: Support plain text and MD5 authentication
- GLBP: Support plain text and MD5 authentication
12、 edition
- HSRP: Support two versions HSRP: edition 1 and 2, edition 1 By default HSRP edition
- VRRP: Default VRRP Version is version 2, No version 1
- GLBP: nothing
13、 fictitious MAC Address
- HSRP: Be similar to
0000.00 07.ac02
, The last digit indicates the group number
- VRRP: Be similar to
0000.5e00.0102
, The last digit indicates the group number
- GLBP:
0007.b4xx.xxxx
summary
- What is? GLBP?
- GLBP advantage
- GLBP role
- AVG
- AVF
- GLBP Load balancing algorithm
- Round-Robin
- Host-dependent
- Weighted
- GLBP state
- AVG Six states
- AVF Four kinds of state
- GLBP timer
- Hold timer
- Redirect timer
- Secondary hold timer
- HSRP、VRRP、GLBP Comparison between the three
- 1、 meaning
- 2、 Range
- 3、 standard
- 4、OSI layer
- 5、 Whether load balancing is supported
- 6、 Multicast group IP Address
- 7、 Transmission port number
- 8、 Whether preemption is enabled by default
- 9、 The election
- 10、IPv6 Support
- 11、 authentication
- 12、 edition
- 13、 fictitious MAC Address
- summary
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