MAGP

Multi-active gateway protocol (MAGP) is aimed to solve the default gateway problem when a host is connected to a set of switch routers (SRs) via MLAG.

The network functionality in that case requires that each SR is an active default gateway router to the host, thus reducing hops between the SRs and directly forwarding IP traffic to the L3 cloud regardless which SR traffic comes through.

Configuring MAGP

Prerequisites

Enable IP routing functionality. Run:

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            switch (config)# ip routing

Enable the desired VLAN. Run:

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            switch (config)# vlan 20
switch (config vlan 20)#

Warning

The VLAN cannot be the same one configured for the MLAG IPL, if MLAG is used.

Add this VLAN to the desired interface. Run:

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            switch (config)# interface ethernet 1/1
switch (config interface ethernet 1/1)# switchport access vlan 20

Create a VLAN interface. Run:

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            switch (config)# interface vlan 20
switch (config interface vlan 20)#

Set an IP address to the VLAN interface.

For IPv4, run:

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            switch (config interface vlan 20)# ip address 11.11.11.11 /8

For IPv6, run:

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            switch (config interface vlan 20)# ip address 2001::11 /64

Enable the interface.

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            switch (config interface vlan 20)# no shutdown

Configuring MAGP

Enable MAGP protocol globally. Run:

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            switch (config)# protocol magp

Create a virtual router group for an IP interface. Run:

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            switch (config interface vlan 20)# magp 100

Warning

Up to 255 MAGP IDs are supported.

Set a virtual router primary IP address.

For IPv4, run:

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            switch (config interface vlan 20 magp 100)# ip virtual-router address 11.11.11.254

For IPv6, run:

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            switch (config interface vlan 20 magp 100)# ip virtual-router address 2001::254

Warning

Only a virtual IP from the primary subnet can be configured for MAGP.

Set a virtual router primary MAC address. Run:

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            switch (config interface vlan 20 magp 100)# ip virtual-router mac-address aa:bb:cc:dd:ee:ff

Warning

To obtain the virtual router’s MAC address, please run the command “show vrrp detail”.

Verifying MAGP

To verify the MAGP configuration, run:

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            switch (config) # show magp
 
MAGP 100:
  Interface vlan: 20
  Admin state   : Enabled
  State         : Master
  Virtual IP    : 11.11.11.254
  V6 State      : Master
  Virtual IPv6  : 2001::254
  Virtual MAC   : aa:bb:cc:dd:ee:ff

Warning

This output is to be expected in both MAGP switches.

Useful Reading and Use Cases

For more information about this feature and its potential applications, please refer to the following community post:

protocol magp

	protocol magp no protocol magp Enables MAGP globally and unhides MAGP commands. The no form of the command deletes all the MAGP configuration and hides MAGP commands.
Syntax Description	N/A
Default	Disabled
Configuration Mode	config
History	3.3.4500
Example	switch (config)# protocol magp
Related Commands
Notes	IP routing must be enabled to enable MAGP.

	magp <instance> no magp <instance> Creates an MAGP instance on this interface and enters a new configuration mode. The no form of the command deletes the MAGP instance.
Syntax Description	instance	MAGP instance number Range: 1-255
Default	Disabled
Configuration Mode	config interface vlan
History	3.3.4500
History	3.7.1100	Updated notes
Example	switch (config interface vlan 20)# magp 100 switch (config interface vlan 20 magp 100)#
Related Commands
Notes	Only one MAGP instance can be created on an interface Different interfaces cannot share an MAGP instance MAGP and VRRP are mutually exclusive A maximum total of 64 MAGP instances are supported per switch system

shutdown

	shutdown no shutdown Enables MAGP instance. The no form of the command disables the MAGP instance.
Syntax Description	N/A
Default	Disabled
Configuration Mode	config interface vlan magp
History	3.3.4500
Example	switch (config interface vlan 10 magp 1)# shutdown
Related Commands
Notes

ip virtual-router address

	ip virtual-router address <ip-address> [secondary] no ip virtual-router address <ip-address> [secondary] Sets MAGP virtual IP address. The no form of the command resets this parameter to its default.
Syntax Description	ip-address	The virtual router IP address
Syntax Description	secondary	Adds secondary virtual router address
Default	N/A
Configuration Mode	config interface vlan magp
History	3.3.4500
	3.6.8100	Added “secondary” parameter
	3.9.1000	Added support for MAGP IPv6 instance
Example	switch (config interface vlan 10 magp 1)# ip virtual-router address 10.10.10.10 switch (config interface vlan 20 magp 100) # ip virtual-router address 2001::254
Related Commands
Notes	The MAGP virtual IP address must be different from the interface IP address In a single MAGP instance, IPv4 and IPv6 addresses are both allowed

ip virtual-router mac-address

	ip virtual-router mac-address <mac-address> no ip virtual-router mac-address Sets MAGP virtual MAC address. The no form of the command resets the MAC address to its default.
Syntax Description	mac-address	MAC address (format: aa:bb:cc:dd:ee:ff)
Default	00:00:5E:00:01-<magp instance>
Configuration Mode	config interface vlan magp
History	3.3.4500
	3.9.1000	Added note about MAGP IPv6
	3.9.3000	Updated MAC address to be lowercase
Example	switch (config interface vlan 10 magp 1)# ip virtual-router mac-address aa:bb:cc:dd:ee:ff
Related Commands
Notes	If not defined, "ip virtual-router mac-address <address>" address is used If the "ip virtual-router mac-address <address>" is not defined, the default is used In a single MAGP instance, IPv4 and IPv6 use a single virtual MAC

ip virtual-router mac-address

	ip virtual-router mac-address <address> Sets a global virtual router MAC address.
Syntax Description	address	MAC address (format: aa:bb:cc:dd:ee:ff)
Default	N/A
Configuration Mode	config
History	3.9.0500
Example	switch (config)# ip virtual-router mac-address 00:00:5E:00:11:22
Related Commands	show ip routing
Notes	The system can have only one MAC address If this address is in use, it cannot be changed or removed

show magp

	show magp [<instance>] Displays the MAGP configuration.
Syntax Description	instance	Displays configuration of a specific MAGP instance Range: 1-255
Default	N/A
Configuration Mode	Any command mode
History	3.3.4500
	3.6.5000	Updated example
	3.6.8100	Updated example
	3.9.1000	Updated example
Example	switch (config) # show magp MAGP 100: Interface vlan: 20 Admin state : Enabled State : Master Virtual IP : 11.11.11.200 V6 State : Master Virtual IPv6 : 2001::254 Virtual MAC : aa:bb:cc:dd:ee:ff Associated IP Addresses: 11.11.11.254 Associated IPv6 Addresses: 2001::200
Related Commands
Note

show magp interface vlan

	show magp interface vlan <id> Displays the configuration of a specific MAGP instance.
Syntax Description	instance	MAGP instance number Range: 1-255
Default	N/A
Configuration Mode	Any command mode
History	3.3.4500
	3.6.5000	Updated example
	3.6.8100	Updated example
	3.9.1000	Updated example
Example	switch (config) # show magp interface vlan 20 MAGP 100: Interface vlan: 20 Admin state : Enabled State : Master Virtual IP : 11.11.11.200 V6 State : Master Virtual IPv6 : 2001::254 Virtual MAC : aa:bb:cc:dd:ee:ff Associated IP Addresses: 11.11.11.254 Associated IPv6 Addresses: 2001::200
Related Commands
Notes

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