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Webcast-Catalyst9k
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HSRP using subinterface native vlan

Hi all,

I have 2 cisco 7609 connected to non-cisco switches which do not support vlan tagging. These non-cisco swicthes are having 6 IP segments (ex: 172.1.1.0/24, 172.1.2.0/24, ...).

The design is as below:

7609 == 7609

V V

[core sw]==[core sw]

V V

[server : 6 segment]

Because the core switches dont support vlan tagging, my idea is to break the 7609-core sw into subinterfaces

int G0/1

description Connection to Core switch

no ip add

int G0/1.1

encap dot1 10 native

ip add 172.1.1.2 255.255.255.0

vrrp 10 ip 172.1.1.1

vrrp 10 priority 110

int G0/1.2

encap dot1 20 native

ip add 172.1.2.2 255.255.255.0

vrrp 20 ip 172.1.2.1

vrrp 20 priority 110

int g2/0

description Connection 7609 II

?????

----------------------

int G0/1

description Connection to Core switch

no ip add

int G0/1.1

encap dot1 10 native

ip add 172.1.1.3 255.255.255.0

vrrp 10 ip 172.1.1.1

int G0/1.2

encap dot1 20 native

ip add 172.1.2.3 255.255.255.0

vrrp 20 ip 172.1.2.1

int g2/0

description Connection 7609 I

?????

------------------------------

Both my routers can ping to the servers but i need to configure HSRP between these two 7609 routers. But currently m routers cannot ping to each other (172.1.1.2 cannot ping to 172.1.1.3 and vice versa)

I need to know the config between 7609 I & II. Any help beyond that would also be great!

Thanks in advance

1 REPLY
Silver

Re: HSRP using subinterface native vlan

I may not understood the question clearly.

Do you mean the core switch cannot support VLAN trunking ? The sub-interace of 7609 is already VLAN enabled w/ 802.1q. You may need to have dual connections from each 7609 to the core switch. Then use the core switch to provide the LAN connectivity between 7609s.

And, are you consider to remove the VRRP and enable HSRP instead ?

Will the connection between two core switches support VLAN trunking ?

Will the core switch able to enable layer 3 switching / routing to off-load the traffic to 7609 ?

Hope this helps.

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