Collapsed Core - Access with Nexus and 3850 switches

[burugudunski]

Hi,

I'm building a design for a LAN and was thinking of using nexus 93xx as my core switch (x2) and 3850s as my access switches. I'd like to ask on the nexus switch how or what do you configure on to have HA on vlan interfaces (svi). 

From the data sheets is has 

490 Maximum number of Hot-Standby Router Protocol (HSRP) groups

Is it still HSRP?

Any help or link would be appreciated.

Thank you, 

[Mark Malone]

Yes you can still use HSRP , its just set slightly different , for faster failover in DC environments BFD is usually used with it as it reduces failover times

standard port-channel on 3850 side and just a vpc port-channel on 9k side so its split across both

example of one of my 7ks lab switches using bfd we dropped failover times from 14 seconds to 1 by using bfd with hsrp , but you can just use hsrp on its own , I think hsrpv2 will support more groups than that 4096 if used

interface Vlan99
  description Test Vlan Feature BFD
  no shutdown
  bfd interval 250 min_rx 250 multiplier 3
  bfd authentication Keyed-SHA1 key-id 99 hex-key 58696C696E78
  ip address 192.168.99.7/24
  ip router eigrp 99
  ip eigrp 99 bfd
  hsrp bfd
  hsrp version 2
  hsrp 99
    authentication md5 key-string bidirectional
    name HSRP.BFD.TEST
    preempt
    priority 150
    ip 192.168.99.8

interface Vlan99
  description Test Vlan Feature BFD
  no shutdown
  bfd interval 250 min_rx 250 multiplier 3
  bfd authentication Keyed-SHA1 key-id 99 hex-key 58696C696E78
  ip address 192.168.99.6/24
  ip router eigrp 99
  ip eigrp 99 bfd
  hsrp bfd
  hsrp version 2
  hsrp 99
    authentication md5 key-string bidirectional
    name HSRP.BFD.TEST
    preempt
    priority 110
    ip 192.168.99.8

router eigrp 99
  bfd
  autonomous-system 99
  router-id 10.1.1.1
  address-family ipv4 unicast

[burugudunski]

Thank you for the prompt reply Mark! Do you know any other HA option apart from HSRPv2+BFD? 

[Mark Malone · Accepted solution]

Only the other standard FHRPs but your limited on 9Ks they don't support GLBP only VRRP & HSRP as its a stripped down version of NX-OS , no bgp/mpls/rspan/ vdc etc 9ks still missing a bit , great hardware though