Last Updated on August 7, 2021 by Admin 3
Which of the following are characteristics of GLBP? (Select 2 choices.)
- One router is elected as the active router, and another router is elected as the standby router.
- One router is elected as the master router, and all other routers are placed in the backup state.
- All routers in a GLBP group can participate by forwarding a portion of the traffic.
- In a GLBP group, only one AVG and only one AVF can be assigned.
- In a GLBP group, only one AVG can be assigned but multiple AVFs can be assigned.F. In a GLBP group, multiple AVGs can be assigned but only one AVF can be assigned.
Explanation:
The following are characteristics of Gateway Load Balancing Protocol (GLBP):
-All routers in a GLBP group can participate by forwarding a portion of the traffic.
-Only one active virtual gateway (AVG) can be assigned in a GLBP group, but multiple active virtualforwarders (AVFs) can be assigned in a GLBP group.
GLBP is a Ciscoproprietary protocol used to provide router redundancy and load balancing. GLBP enables you to configure multiple routers into a GLBP group; the routers in the group receive traffic sent to a virtual IP address that is configured for the group. Each GLBP group contains an AVG that is elected based on which router is configured with the highest priority value or the highest IP address value if multiple routers are configured with the highest priority value.
The other routers in the GLBP group are configured as primary or secondary AVFs. The AVG assigns a virtual Media Access Control (MAC) address to up to four primary AVFs; all other routers in the group are considered secondary AVFs and are placed in the listen state. The virtual MAC address is always 0007.b400.xxyy, where xx is the GLBP group number and yy is the AVF number.
When the AVG receives Address Resolution Protocol (ARP) requests that are sent to the virtual IP address for the GLBP group, the AVG responds with different virtual MAC addresses. This provides load balancing, because each of the primary AVFs will participate by forwarding a portion of the traffic sent to the virtual IP address. If one of the AVFs fails, the AVG assigns the AVF role to another router in the group. If the AVG fails, the AVF with the highest priority becomes the AVG; by default, preemption is disabled.
Additionally, you can control the percentage of traffic that is sent to a specific gateway by configuring weighted load balancing. By default GLBP uses a roundrobin technique to load balance between routers. If you configure weighted load balancing, GLBP can send a higher percentage of traffic to a single GLBP group member based on the weight values assigned to the interfaces of that member.
The election of an active router and a standby router are characteristics of Hot Standby Router Protocol (HSRP), not GLBP. Like GLBP, HSRP provides router redundancy. However, only one router in an HSRP group is active at any time. If the active router becomes unavailable, the standby router becomes the active router.
The election of a master router and the placement of all other routers in the group into the backup state are characteristics of Virtual Router Redundancy Protocol (VRRP). Like GLBP and HSRP, VRRP provides router redundancy. However, similar to HSRP, only one router is active at any time. If the master router becomes unavailable, one of the backup routers becomes the master router.
A GLBP group can contain only one AVG. All other routers in the group are configured as AVFs; multiple AVFs can be configured in a GLBP group.
The following are characteristics of Gateway Load Balancing Protocol (GLBP):
-All routers in a GLBP group can participate by forwarding a portion of the traffic.
-Only one active virtual gateway (AVG) can be assigned in a GLBP group, but multiple active virtualforwarders (AVFs) can be assigned in a GLBP group.
GLBP is a Ciscoproprietary protocol used to provide router redundancy and load balancing. GLBP enables you to configure multiple routers into a GLBP group; the routers in the group receive traffic sent to a virtual IP address that is configured for the group. Each GLBP group contains an AVG that is elected based on which router is configured with the highest priority value or the highest IP address value if multiple routers are configured with the highest priority value.
The other routers in the GLBP group are configured as primary or secondary AVFs. The AVG assigns a virtual Media Access Control (MAC) address to up to four primary AVFs; all other routers in the group are considered secondary AVFs and are placed in the listen state. The virtual MAC address is always 0007.b400.xxyy, where xx is the GLBP group number and yy is the AVF number.
When the AVG receives Address Resolution Protocol (ARP) requests that are sent to the virtual IP address for the GLBP group, the AVG responds with different virtual MAC addresses. This provides load balancing, because each of the primary AVFs will participate by forwarding a portion of the traffic sent to the virtual IP address. If one of the AVFs fails, the AVG assigns the AVF role to another router in the group. If the AVG fails, the AVF with the highest priority becomes the AVG; by default, preemption is disabled.
Additionally, you can control the percentage of traffic that is sent to a specific gateway by configuring weighted load balancing. By default GLBP uses a roundrobin technique to load balance between routers. If you configure weighted load balancing, GLBP can send a higher percentage of traffic to a single GLBP group member based on the weight values assigned to the interfaces of that member.
The election of an active router and a standby router are characteristics of Hot Standby Router Protocol (HSRP), not GLBP. Like GLBP, HSRP provides router redundancy. However, only one router in an HSRP group is active at any time. If the active router becomes unavailable, the standby router becomes the active router.
The election of a master router and the placement of all other routers in the group into the backup state are characteristics of Virtual Router Redundancy Protocol (VRRP). Like GLBP and HSRP, VRRP provides router redundancy. However, similar to HSRP, only one router is active at any time. If the master router becomes unavailable, one of the backup routers becomes the master router.
A GLBP group can contain only one AVG. All other routers in the group are configured as AVFs; multiple AVFs can be configured in a GLBP group.
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