Redundancy management

1

Switch to the interface/tunnel/network bridge configuration mode for which it is necessary to configure VRRP.

esr(config)# interface <IF-TYPE><IF-NUM>

<IF-TYPE> – interface type;

<IF-NUM> – F/S/P – F frame (1), S – slot (0), P – port.

esr(config)# tunnel <TUN-TYPE><TUN-NUM>

<TUN-TYPE> – tunnel type;

<TUN-NUM> – tunnel number.

esr(config)# bridge <BR-NUM>

<BR-NUM> – bridge number.

2

Configure the required parameters on the interface/network bridge, including IP address.

3

Enable VRRP process on IP interface.

esr(config-if-gi)# vrrp

esr(config-if-gi)# ipv6 vrrp

4

Set virtual IP address of VRRP router.

esr(config-if-gi)# vrrp ip <ADDR/LEN>

<ADDR/LEN> – virtual IP address, defined as AAA.BBB.CCC.DDD/EE where each part AAA-DDD takes values of [0..255] and EE takes values of [1..32]. You can specify several IP addresses separated by commas. Up to 4 IP addresses can be assigned to the interface.

esr(config-if-gi)# ipv6 vrrp ip <IPV6-ADDR>

<IPV6-ADDR> – virtual IPv6 address, defined as X:X:X:X::X where each part takes values in hexadecimal format [0..FFFF]. Up to 8 IPv6 addresses separated by commas can be specified. 

5

Set the VRRP router identifier.

esr(config-if-gi)# vrrp id <VRID>

<VRID> – VRRP router identifier, takes values in the range of [1..255].

esr(config-if-gi)# ipv6 vrrp id <VRID>

6

Set the VRRP router priority (optional).

esr(config-if-gi)# vrrp priority <PR>

<PR> – VRRP router priority, takes values in the range of [1..254].

Default value: 100.

esr(config-if-gi)# ipv6 vrrp priority <PR>

7

Identify the VRRP router’s inherence to a group. The group provides the ability to synchronize several VRRP processes, so if in one of the processes there is a wizard change, then in another process roles will also be changed (optional).

esr(config-if-gi)# vrrp group <GRID>

<GRID> – VRRP router group identifier, takes values in the range of [1..32].

esr(config-if-gi)# ipv6 vrrp group <GRID>

8

Set the IP address that will be used as a source IP address for VRRP messages (optional).

esr(config-if-gi)# vrrp source-ip <IP>

<ADDR> – sender IP address, defined as AAA.BBB.CCC.DDD where each part takes values of [0..255].

esr(config-if-gi)# ipv6 vrrp source-ip <IPV6>

<IPV6> – source IPv6 address, defined as X:X:X:X::X where each part takes values in hexadecimal format [0..FFFF].

9

Set the interval between sending VRRP messages (optional).

esr(config-if-gi)# vrrp timers advertise <TIME>

<TIME> – time in seconds, takes values of [1..40].

Default value: 1 second.

esr(config-if-gi)# ipv6 vrrp timers advertise <TIME>

10

Set the interval after which GratuituousARP messages are sent when switching the router to the Master status (optional).

esr(config-if-gi)# vrrp timers garp delay <TIME>

<TIME> – time in seconds, takes values of [1..60].

Default value: 5 seconds.

11

Set the amount of GratuituousARP messages that will be sent when switching the router to the Master status (optional).

esr(config-if-gi)# vrrp timers garp repeat <COUNT>

<COUNT> – amount of messages, takes values of [1..60].

Default value: 5.

12

Set the interval after which GratuituousARP messages will be sent periodically while the router is in the Master status (optional).

esr(config-if-gi)# vrrp timers garp refresh <TIME>

<TIME> – time in seconds, takes values of [1..65535].

Default value: Periodic sending is disabled.

13

Set the amount of GratuituousARP messages that will be sent with the garprefresh period while the router is in the Master status (optional).

esr(config-if-gi)# vrrp timers garp refresh-repeat <COUNT>

<COUNT> – amount of messages, takes values of [1..60].

Default value: 1.

14

Specify whether the higher priority Backup router would try to take the Master role from the current lower priority Master router (optional).

esr(config-if-gi)# vrrp preemption disable

esr(config-if-gi)# ipv6 vrrp preemption disable

15

Set the time interval after which the higher priority Backup route will try to take the Master role from the current lower priority Master router (optional).

esr(config-if-gi)# vrrp preemption delay <TIME>

<TIME> – timeout, takes value in seconds [1..1000].

Default value: 0

esr(config-if-gi)# ipv6 vrrp preemption delay <TIME>

16

Set the password for neighbour authentication (optional).

esr(config-if-gi)# vrrp authentication key ascii-text
{ <CLEAR-TEXT> | encrypted <ENCRYPTED-TEXT> }

<CLEAR-TEXT> – password, set by the string of 8 to 16 characters;

<ENCRYPTED-TEXT> – encrypted password of 8 to 16 bytes (from 16 to 32 characters) in hexadecimal format (0xYYYY ...) or (YYYY ...).

17

Specify authentication algorithm (optional).

esr(config-if-gi)# vrrp authentication algorithm <ALGORITHM>

<ALGORITHM> – authentication algorithm:

• cleartext – password, transmitted in clear text;
• md5 – password is hashed by md5 algorithm.

18

Specify VRRP version (optional).

esr(config-if-gi)# vrrp version <VERSION>

<VERSION> – VRRP version: 2, 3.

19

Set the mode when vrrp IP address remains in the UP status regardless of the status of the interface itself (optional).

esr(config-if-gi)# vrrp force-up

20

Specify the delay between the assignment of MASTER status to ipv6 vrrp and the start of ND messages distribution (optional).

esr(config-if-gi)# ipv6 vrrp timers nd delay <TIME>

<TIME> – time in seconds, takes values of [1..60].

Default value: 5.

21

Specify the period of ND protocol information update for ipv6 vrrp in MASTER status (optional).

esr(config-if-gi)# ipv6 vrrp timers nd refresh <TIME>

<TIME> – time in seconds, takes values of [1..65535].

Default value: 5.

22

Specify the amount of ND messages sent in the update period for ipv6 vrrp in MASTER status (optional).

esr(config-if-gi)# ipv6 vrrp timers nd refresh-repeat <NUM>

<NUM> – amount, takes values of [1..60].

Default value: 0.

23

Specify the amount of ND packets sendings after setting ipv6 vrrp to the MASTER status (optional).

esr(config-if-gi)# ipv6 vrrp timers nd repeat <NUM>

<NUM> – amount, takes values of [1..60].

Default value: 1.

1

Configure VRRP according to the section VRRP configuration algorithm or configure SLA.

2

Add Tracking object to the system and switch to the Tracking object parameters configuration mode.

esr(config)#tracking <ID>

<ID> – Tracking object number, takes values of [1..100].

3

Set a rule for tracking VRRP/SLA processes, based on which Tracking object will switch to active state.

esr(config-track)# track vrrp id <VRID> state [not] { master | backup | fault } [vrf <VRF> ]

<VRID> – trackable VRRP router identifier, takes values in the range of [1..255];

<VRF> – VRF name, set by the string of up to 31 characters.

<NUM> – SLA test name, set in range of [1..10000];

<MODE> – SLA test tracking mode, may take the following values:

• state – state of the SLA test is monitored;
• reachability – state of the communication channel is monitored, which is provided by the SLA test.

4

Enable Tracking object.

esr(config-tracking)#enable

<MODE> – condition for the Tracking object to be in the active state, takes the following values:

• and – Tracking object is in active state, if all tracked conditions are in active state;
• or – Tracking object is in active state, if at least one tracked condition is in active state.

7.1

Add the ability to manage a static IP route to the specified subnet (optional).

esr(config)# ip route [ vrf <VRF> ] <SUBNET> { <NEXTHOP> [ resolve ] |
interface <IF> | tunnel <TUN> | wan load-balance rule <RULE> |
blackhole | unreachable | prohibit } [ <METRIC> ] [ track <TRACK-ID> ]

<VRF> – VRF name, set by the string of up to 31 characters.

<SUBNET> – destination address, can be specified in the following formats:

AAA.BBB.CCC.DDD – host IP address, where each part takes values of [0..255].

AAA.BBB.CCC.DDD/NN – network IP address with prefix mask, where AAA-DDD take values of [0..255] and NN takes values of [1..32].

<NEXTHOP> – gateway IP address, defined as AAA.BBB.CCC.DDD where each part takes values of [0..255];

• resolve – when specifying this parameter, gateway IP address will be recursively calculated through the routing table. If the recursive calculation fails to find a gateway from a directly connected subnet, then this route will not be installed into the system;

<IF> – an IP interface name specified in the form described in Section Types and naming order of router interfaces;

<TUN> – the name of the tunnel is specified as described in section Types and naming order of router tunnels;

<RULE> – wan rule number, set in the range of [1..50];

• blackhole – when specifying the command, the packets to this subnet will be removed by the device without sending notifications to a sender;
• unreachable – when specifying the command, the packets to this subnet will be removed by the device, a sender will receive in response ICMP Destination unreachable (Host unreachable, code 1);
• prohibit – when specifying the command, the packets to this subnet will be removed by the device, a sender will receive in response ICMP Destination unreachable (Communication administratively prohibited, code 13);

<METRIC> – route metric, takes values of [0..255];

<TRACK-ID> – Tracking object identifier. If the router is bound to the Tracking object, it will appear in the system only after meeting all requirements specified in the object.

<ID> – Tracking object number, takes values of [1..100];

<PRIO> – priority of the VRRP process, which will be set if the Tracking object is in the active state, takes values of [1..254];

<INC> – value by which the priority of the VRRP process will increase if the Tracking object is in the active state, takes values of [1..254];

<DEC> – value by which the priority of the VRRP process will decrease if the Tracking object is in the active state, takes values of [1..254].

<NEXTHOP> – gateway IP address in the AAA.BBB.CCC.DDD format, where each part takes values of [0..255];

<METRIC> – route metric, takes values of [0..255];

<ID> – Tracking object number, takes values of [1..100].

7.5

Add the ability to control the BGP AS-Path attribute that will be added to the front of the AS-Path list (optional).

esr(config-route-map-rule)# action set as-path
prepend <AS-PATH> track <ID>

<AS-PATH> – list of autonomous system numbers to be added to the current value in the route. Specified as AS,AS,AS, takes values of [1..4294967295];

<ID> – Tracking object number, takes values of [1..100].

<METRIC> – BGPMED attribute value, takes values of [0..4294967295];

<ID> – Tracking object number, takes values of [1..100].

1

Select the routers communication mode.

 ip firewall failover sync-type <MODE>

<MODE> – communication mode:

• unicast – unicast mode;
• multicast – multicast mode.

<ADDR> – multicast IP address, defined as AAA.BBB.CCC.DDD where each part takes values of [0..255].

1

To configure DHCP failover, switch to its configuration menu.

ip dhcp-server failover [ vrf <VRF> ]

<VRF> – VRF name, set by the string of up to 31 characters.

active-active – operating mode with two active routers;

active-standby – operating mode with one active router and one standby router.

<ROLE> – DHCP server role when operating in standby mode:

• primary – active DHCP server mode;
• secondary – standby DHCP server mode.