04-26-2010 10:01 AM - edited 03-06-2019 10:48 AM
Hi all
i have this home network
Router connected to ISP is doing NAT.
Router is connected to layer 3 switch on subnet 192.168.5.1.
Layer 3 switche has 3 vlans 10,20, and 30 to each layer 2 switch.
DHCP is config on each Vlans.
i am getting one new layer 3 switch for this network.
is this possible with new switch i can run hsrp with existing layer 3 switch?
if yes how can i do that for redundancy?
thanks
mahesh
Solved! Go to Solution.
04-26-2010 01:09 PM
Mahesh
Ahh okay.
So you need to -
1) connect the 2 L3 switches together using a L2 trunk
2) for each vlan you need 3 addresses eg.
vlan 10 = 192.168.5.0 255.255.255.0
192.168.5.1 =virtual ip
192.168.5.2 = sw1 SVI
192.168.5.3 = sw2 SVI
SW1
====
int vlan 10
ip address 192.168.5.2 255.255.255.0
standby 10 ip 192.168.5.1
standby 10 priority 110
standby 10 preempt
standby 10 auth
SW2
====
int vlan 10
ip address 192.168.5.3 255.255.255.0
standby 10 ip 192.168.5.1
standby 10 auth
Jon
04-26-2010 12:10 PM
Mahesh
It is possible but how are things connected to your L3 switch at the moment ? If you have PCs with one connection to the existing L3 switch then HSRP won't benefit you much.
Jon
04-26-2010 01:01 PM
hi jon
thanks for reply
i want to set us for Cisco switching exam
to learn how hsrp works
thanks
mahesh
04-26-2010 01:09 PM
Mahesh
Ahh okay.
So you need to -
1) connect the 2 L3 switches together using a L2 trunk
2) for each vlan you need 3 addresses eg.
vlan 10 = 192.168.5.0 255.255.255.0
192.168.5.1 =virtual ip
192.168.5.2 = sw1 SVI
192.168.5.3 = sw2 SVI
SW1
====
int vlan 10
ip address 192.168.5.2 255.255.255.0
standby 10 ip 192.168.5.1
standby 10 priority 110
standby 10 preempt
standby 10 auth
SW2
====
int vlan 10
ip address 192.168.5.3 255.255.255.0
standby 10 ip 192.168.5.1
standby 10 auth
Jon
04-26-2010 02:06 PM
Hi jon
Thanks for reply
right now vlan 10 has ip 192.168.10.1
vlan 20 has 192.168.20.1 and vlan 30 has 192.168.30.1 on sw1.
and all 3 vlan ips are Default gateway for 3 layer 2 switches.
you mean to say i should find 3 valid ips in each vlan range?
04-27-2010 02:16 AM
mahesh18 wrote:
Hi jon
Thanks for reply
right now vlan 10 has ip 192.168.10.1
vlan 20 has 192.168.20.1 and vlan 30 has 192.168.30.1 on sw1.
and all 3 vlan ips are Default gateway for 3 layer 2 switches.
you mean to say i should find 3 valid ips in each vlan range?
Mahesh
You already have one of the addresses ie. 192.168.10.1, 192.168.20.1, 192.168.30.1 so you just need another 2 IPs.
Jon
04-30-2010 09:39 AM
10-09-2010 10:07 AM
Hi jon,
Many thanks again.
today i config my switch b for HSRP Lan redundancy successfully
mahesh
04-26-2010 12:22 PM
I guess you'll configure your new L3 switch with the aforementioned VLANs.
One way I can think of is to have both L3 switches participate in HSRP on the 3 vlans. For each vlan, one switch will be Active while the other will be Standby.
for example, for vlan 11, swA will be the Active, and swB will be the Standby:
on swA:
int vlan 11
standby 1 ip ...
standby 1 priority 150
on swB:
int vlan 11
standby 1 ip ..
standby 1 prioriry 100 (this line can be omitted since the default priority is 100).
04-26-2010 01:07 PM
Hi Thanks for reply
so you mean to say new switch layer 3 can have same config as of working layer switch?
any new config which i need on new layer 3 switch.
thanks
mahesh
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: