BigIron RX Series Configuration Guide
441
53-1001810-01
Overview of VRRP
17
If Router1 fails, you could configure Host1 to use Router2. Configuring one host with a different
default gateway might not require too much extra administration. However, consider a more
realistic network with dozens or even hundreds of hosts per subnet; reconfiguring the default
gateways for all the hosts is impractical. It is much simpler to configure a VRRP virtual router on
Router1 and Router2 to provide a redundant path for the hosts. If VRRP is enabled as in
Figure 84
,
Router 2 provides the default gateway out of the subnet if Router 1 fails.
FIGURE 84
Router1 and Router2 are configured as a VRRP virtual router to provide redundant network access
for Host1
With VRRP, you configure virtual routers that span across the physical routers. A virtual router acts
as a default router for hosts on a shared LAN. For example,
Figure 84
has one virtual router
configured identified as VRID1.This virtual router ID is associated with Router 1 and Router 2.
Since there are more than one IP addresses configured on Router 1 and Router 2, one of the
physical addresses is assigned to the virtual router. For example, in
Figure 84
, IP address
192.53.5.1, the IP address assigned to Router 1’s interface 1/6, is assigned as the IP address of
virtual router VRID1. Router 1 becomes the Owner of the virtual router VRID1 and is the router that
responds to packets addresses to any of the IP addresses in virtual router VRID1.
In addition, one router in the virtual router is elected as the Master router. Other routers act as
backups. The Master router is the one that forwards packets sent to the IP addresses in the virtual
router and answers ARP requests for these IP addresses. The Backup router takes over for the
Master router when the Master router fails.
NOTE
You can provide more redundancy by also configuring a second VRID with Router2 as the Owner and
Router1 as the Backup. This type of configuration is sometimes called Multigroup VRRP.
Internet
or
enterprise Intranet
Internet
or
enterprise Intranet
Host1
Default Gateway
192.53.5.1
192.53.5.1
e 1/6
e 1/5
192.53.5.3
e 3/2
e 2/4
VRID1
Router1 = Master
IP address = 192.53.5.1
MAC address = 00-00-5E-00-01-01
Priority = 255
VRID1
Router2 = Backup
IP address = 192.53.5.1
MAC address = 00-00-5E-00-01-01
Priority = 100
Owner
Router1
Router2
Содержание Brocade DCX
Страница 40: ...xl BigIron RX Series Configuration Guide 53 1001810 01 ...
Страница 72: ...lxxii BigIron RX Series Configuration Guide 53 1001810 01 ...
Страница 88: ...16 BigIron RX Series Configuration Guide 53 1001810 01 Searching and filtering output 1 ...
Страница 300: ...228 BigIron RX Series Configuration Guide 53 1001810 01 Displaying IP information 7 ...
Страница 318: ...246 BigIron RX Series Configuration Guide 53 1001810 01 Deploying a LAG 8 ...
Страница 418: ...346 BigIron RX Series Configuration Guide 53 1001810 01 SuperSpan 12 ...
Страница 482: ...410 BigIron RX Series Configuration Guide 53 1001810 01 MRP CLI example 14 ...
Страница 506: ...434 BigIron RX Series Configuration Guide 53 1001810 01 Displaying VSRP information 15 ...
Страница 566: ...494 BigIron RX Series Configuration Guide 53 1001810 01 QoS for the oversubscribed 16 x 10GE modules 18 ...
Страница 582: ...510 BigIron RX Series Configuration Guide 53 1001810 01 Viewing Layer 2 ACLs 20 ...
Страница 634: ...562 BigIron RX Series Configuration Guide 53 1001810 01 Troubleshooting ACLs 21 ...
Страница 642: ...570 BigIron RX Series Configuration Guide 53 1001810 01 Trunk formation 22 ...
Страница 746: ...674 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIP filters 24 ...
Страница 808: ...736 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPF information 25 ...
Страница 926: ...854 BigIron RX Series Configuration Guide 53 1001810 01 Generalized TTL security mechanism support 26 ...
Страница 938: ...866 BigIron RX Series Configuration Guide 53 1001810 01 Displaying MBGP information 27 ...
Страница 950: ...878 BigIron RX Series Configuration Guide 53 1001810 01 Using secure copy 28 ...
Страница 988: ...916 BigIron RX Series Configuration Guide 53 1001810 01 Clearing IS IS information 29 ...
Страница 998: ...926 BigIron RX Series Configuration Guide 53 1001810 01 Configuring BFD for the specified protocol 30 ...
Страница 1014: ...942 BigIron RX Series Configuration Guide 53 1001810 01 Displaying multi device port authentication information 31 ...
Страница 1054: ...982 BigIron RX Series Configuration Guide 53 1001810 01 Sample 802 1x configurations 33 ...
Страница 1072: ...1000 BigIron RX Series Configuration Guide 53 1001810 01 IP source guard 35 Syntax show ip source guard ethernet port num ...
Страница 1108: ...1036 BigIron RX Series Configuration Guide 53 1001810 01 sFlow 39 ...
Страница 1190: ...1118 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIPng information 44 ...
Страница 1270: ...1198 BigIron RX Series Configuration Guide 53 1001810 01 Displaying ACLs 47 ...
Страница 1310: ...1238 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPFv3 information 48 ...
Страница 1382: ...1310 BigIron RX Series Configuration Guide 53 1001810 01 Commands That Require a Reload D ...
Страница 1435: ...BigIron RX Series Configuration Guide 1363 53 1001810 01 VSRP E ...
Страница 1436: ...1364 BigIron RX Series Configuration Guide 53 1001810 01 VSRP E ...