What is GLBP in networking?
What is GLBP in networking?
Gateway Load Balancing Protocol (GLBP) is a Cisco proprietary protocol that attempts to overcome the limitations of existing redundant router protocols by adding basic load balancing functionality. In addition to being able to set priorities on different gateway routers, GLBP allows a weighting parameter to be set.
How many routers are there in GLBP group?
1024 virtual routers
GLBP supports up to 1024 virtual routers (GLBP groups) on each physical interface of a router, and up to 4 virtual forwarders per group. The redundancy scheme of GLBP enables you to preempt an active virtual gateway with a higher priority backup virtual gateway that has become available.
How do I check my GLBP status?
Enable GLBP authentication using the configured key chain and group number of 1. Change the default GLBP load balancing behavior to using weighting. Exit into global configuration mode. Create a tracked object that will monitor the line protocol status of the fa0/0 interface using an object number of 1.
What is VRRP configuration?
Configuring VRRP. The Virtual Router Redundancy Protocol (VRRP) is an election protocol that dynamically assigns responsibility for one or more virtual routers to the VRRP routers on a LAN, allowing several routers on a multiaccess link to utilize the same virtual IP address.
What is difference between HSRP VRRP and GLBP?
The main difference is that GLBP allows the load balancing of traffic among the master and standby routers while in HSRP (and VRRP) the standby routers do not help handle traffic. However VRRP load balancing is a proprietary implementation of VRRP and uses specific MAC addresses for that purpose.
What port is VRRP?
Hot Standby Router Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP)
| HSRP | VRRP |
|---|---|
| HSRP version 1 uses UDP port number 1985 and multicast address 224.0.0.2 and version 2 uses UDP port 1985 and 224.0.0.102 as multicast address. | VRRP uses multicast address 224.0.0.18 and protocol number 112 |
What is VRRP IP address?
VRRP (defined in RFC 3768) provides dynamic failover of IP addresses from one router to another in the event of failure. You can implement VRRP to provide a highly available default path to a gateway without needing to configure dynamic routing or router discovery protocols on end hosts.
How do I set up VRRP?
- SUMMARY STEPS. enable. configure terminal. interface type number. ip address ip-address mask. vrrp group description text. vrrp group priority level.
- SUMMARY STEPS. enable. configure terminal. track object-number interface type number {line-protocol | ip routing} interface type number. vrrp group ip ip-address.
- Before You Begin.
Which is better HSRP or GLBP?
The main difference is that GLBP allows the load balancing of traffic among the master and standby routers while in HSRP (and VRRP) the standby routers do not help handle traffic. With GLBP, the single virtual IP address is associated with one virtual MAC address per GLBP member.
What port does VRRP use?
How to enable GLBP on a Cisco router?
Assuming the basic interface IP and routing has been pre-configured, the command to enable GLBP in each router is as follows. So we’re using GLBP group number 123 and virtual IP 10.1.1.254, and this command should be consistent on each router.
What does GLBP stand for in Gateway load balancing protocol?
Gateway Load Balancing Protocol (GLBP) protects data traffic from a failed router or circuit, like Hot Standby Router Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP), while allowing packet load sharing between a group of redundant routers.
What are the commands used to configure GLBP?
Like HSRP and VRRP, only a few commands are used to configure GLBP using the default settings. Table 1 shows the common commands that are used to configure basic GLBP as well a few of the most commonly used commands to alter GLBP’s behavior. The group-number can be any value from 1 to 1023.
How many Virtual Forwarders can a GLBP group support?
You can configure GLBP in such a way that traffic from LAN clients can be shared by multiple routers, thereby sharing the traffic load more equitably among available routers. GLBP supports up to 1024 virtual routers (GLBP groups) on each physical interface of a router, and up to 4 virtual forwarders per group.
