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.
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What is GLBP used for?
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.
Is GLBP Cisco proprietary?
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.
How do I set up GLBP?
Before configuring GLBP, ensure that the devices can support multiple MAC addresses on the physical interfaces. For each GLBP forwarder to be configured, an additional MAC address is used. GLBP provides automatic device backup for IP hosts configured with a single default gateway on an IEEE 802.3 LAN.
What is the significant difference with 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 is the requirement for an HSRP group?
What are two requirements for an HSRP group? (Choose two.) Exactly one active router: Only one Active Router per HSRP group will be elected based on highest priority. In case of equal priority, Highest IP address will be elected as Active Router. One or more standby routers: There can be one or more Standby Routers.
What is an active virtual gateway?
Active Virtual Gateway(AVG): This AVG router has the highest priority value or IP address in the group, it responds to all ARP requests for MAC addresses which it sends to the virtual router IP address.
What is the difference between HSRP and VRRP and GLBP?
One of the main differences is that VRRP is industry-standard while HSRP and GLBP are Cisco-proprietary protocols. VRRP and HSRP distribute themselves over a single layer 3 ethernet switch or a router to be the active one in a group, whereas GLBP can target up to four routers by configuring load balancing schemes.
Which command enables GLBP on an interface?
Explanation. The “glbp ip ” command is used to enable GLBP (Gateway Load Balancing Protocol) on the configured interface. However, the IP address is optional and you can enable GLBP by using only the “glbp ” command.
What is AVG in GLBP?
Explanation. The AVG (Active Virtual Gateway) has a special role in GLBP (Gateway Load Balancing Protocol). Two or more routers on a LAN subnet form a GLBP group. Each GLBP router interface has a unique physical IP address.
How do I check my GLBP load balance?
GLBP load Balancing : Round-Robin : AVG will assign the virtual Mac addresses serial wise, like first virtual Mac address is assigned to AVF1, then to AVF2 etc. Host-dependent : If particular host needs specific virtual Mac address every time then specific AVF is assigned to the hosts by the AVG.
What is HSRP and GLBP?
HSRP provides routing redundancy for routing IP traffic without being dependent on the availability of any single router. GLBP provides routing redundancy similar to HSRP and also provides load balancing over multiple routers by using a single virtual IP address and multiple virtual MAC addresses.
What is difference between VRRP and GLBP?
How do I create a HSRP group?
To achieve basic HSRP configuration, you need to do the following:
- Configure normal IP address on interface (cannot be the same as HSRP virtual IP)
- Bring interface up (no shutdown)
- Configure HSRP group and virtual IP address using the standby command.
How many additional routers can be added in an HSRP group?
HSRP allows you to configure two or more routers as standby routers and only a single router as an active router at a time.
How many HSRP groups can you have?
The switch with a PFC or PFC 3 supports 256 unique HSRP group mappings, but the one with a PFC 2 supports only up to 16 unique groups.
What is the default weight value of GLBP group configuration?
Table 4 – GLBP Complex Configuration Commands
| 1 | Configure the GLBP hello and hold timers. |
|---|---|
| 2 | (Optional) Configure the GLBP weighting values. Note: With GLBP, each of the Active Virtual Forwarders (AVF) is assigned a weight (default is 100); if the defaults are not altered, then each of the AVFs will be equally loaded. |
What is HSRP VRRP and GLBP?
GLBP : Gateway Load Balancing Protocol. VRRP : Virtual Router Redundancy Protocol. HSRP : Hot Standby Router Protocol. FHRP: First Hop Redundancy Protocol.
How many routers can be in an HSRP group?
HSRP is used to provide default gateway redundancy. What is the maximum number of HSRP groups can be created in the router? What are the maximum number of routers can be present in a group? Maximum 16 routers can be present in a group.
Can we do load balancing in HSRP?
Only one active and one standby router are allowed per HSRP group. Thus, HSRP provides Layer-3 redundancy, but no inherent load balancing.