Re: cisco nexus 9000 VRRP Problem

Wesley She · ‎05-08-2022

I have two Cisco C93180YC-FX3 switches, I tried to set vrrp, but I found that if the server uses the same vlan as the upstream, its network speed will become very slow.

I have tried using only a single switch and found the result is the same.

My switch config and network structure are as below：

feature vrrp
feature interface-vlan
feature ssh

int vlan 1
ip address 172.20.1.247 255.255.254.0
no shutdown
vrrp 1
address 172.20.1.254
no shutdown

ip route 0.0.0.0 0.0.0.0 172.20.0.21

int e1/1-2
switchport
switchport mode access
switchport access vlan 1
no shutdown

Network structure

speed test result

balaji.bandi · ‎05-08-2022

is this vPC? ( as per the diagram looks like back to back ?) what speed does each switch connect interface? can you post the config of each witch and show interface x/x output?

BB

***** Rate All Helpful Responses *****

How to Ask The Cisco Community for Help

Wesley She · ‎05-09-2022

No, it is back to back.

To determine if VRRP is the problem, I only use one Cisco Nexus C93180YC-FX3 and have no vpc set up.

sw1 is C93180YC-FX3 and sw2 is cisco 2960x, the relevant config and interface information are as below.

SW1

hostname SW1

feature vrrp
feature interface-vlan
feature ssh

int vlan 1
ip address 172.20.1.247 255.255.254.0
no shutdown
vrrp 1
address 172.20.1.254
no shutdown

ip route 0.0.0.0 0.0.0.0 172.20.0.21

int e1/1-2
switchport
switchport mode access
switchport access vlan 1
no shutdown

--------------------------------------------
SW1# show interface e1/1
Ethernet1/1 is up
admin state is up, Dedicated Interface
  Hardware: 100/1000/10000/25000 Ethernet, address: 1859.f5ef.a998 (bia 1859.f5ef.a998)
  MTU 1500 bytes, BW 1000000 Kbit , DLY 10 usec
  reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, medium is broadcast
  Port mode is access
  full-duplex, 1000 Mb/s, media type is 1G
  Beacon is turned off
  Auto-Negotiation is turned on  FEC mode is Auto
  Input flow-control is off, output flow-control is off
  Auto-mdix is turned off
  Rate mode is dedicated
  Switchport monitor is off 
  EtherType is 0x8100 
  EEE (efficient-ethernet) : n/a
    admin fec state is auto, oper fec state is off
  Last link flapped 00:08:12
  Last clearing of "show interface" counters never
  1 interface resets
  Load-Interval #1: 30 seconds
    30 seconds input rate 56 bits/sec, 0 packets/sec
    30 seconds output rate 816 bits/sec, 1 packets/sec
    input rate 56 bps, 0 pps; output rate 816 bps, 1 pps
  Load-Interval #2: 5 minute (300 seconds)
    300 seconds input rate 104 bits/sec, 0 packets/sec
    300 seconds output rate 760 bits/sec, 1 packets/sec
    input rate 104 bps, 0 pps; output rate 760 bps, 1 pps
  RX
    17 unicast packets  13 multicast packets  8 broadcast packets
    38 input packets  5688 bytes
    0 jumbo packets  0 storm suppression bytes
    0 runts  0 giants  0 CRC  0 no buffer
    0 input error  0 short frame  0 overrun   0 underrun  0 ignored
    0 watchdog  0 bad etype drop  0 bad proto drop  0 if down drop
    0 input with dribble  0 input discard
    0 Rx pause
  TX
    28 unicast packets  717 multicast packets  10 broadcast packets
    755 output packets  57114 bytes
    0 jumbo packets
    0 output error  0 collision  0 deferred  0 late collision
    0 lost carrier  0 no carrier  0 babble  0 output discard
    0 Tx pause
------------------------------------------------------
SW1# show interface e1/2
Ethernet1/2 is up
admin state is up, Dedicated Interface
  Hardware: 100/1000/10000/25000 Ethernet, address: 1859.f5ef.a999 (bia 1859.f5ef.a999)
  MTU 1500 bytes, BW 1000000 Kbit , DLY 10 usec
  reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, medium is broadcast
  Port mode is access
  full-duplex, 1000 Mb/s, media type is 1G
  Beacon is turned off
  Auto-Negotiation is turned on  FEC mode is Auto
  Input flow-control is off, output flow-control is off
  Auto-mdix is turned off
  Rate mode is dedicated
  Switchport monitor is off 
  EtherType is 0x8100 
  EEE (efficient-ethernet) : n/a
    admin fec state is auto, oper fec state is off
  Last link flapped 00:08:37
  Last clearing of "show interface" counters never
  1 interface resets
  Load-Interval #1: 30 seconds
    30 seconds input rate 440 bits/sec, 0 packets/sec
    30 seconds output rate 1024 bits/sec, 1 packets/sec
    input rate 440 bps, 0 pps; output rate 1.02 Kbps, 1 pps
  Load-Interval #2: 5 minute (300 seconds)
    300 seconds input rate 216 bits/sec, 0 packets/sec
    300 seconds output rate 896 bits/sec, 1 packets/sec
    input rate 216 bps, 0 pps; output rate 896 bps, 1 pps
  RX
    228 unicast packets  10 multicast packets  3 broadcast packets
    241 input packets  32763 bytes
    0 jumbo packets  0 storm suppression bytes
    0 runts  0 giants  0 CRC  0 no buffer
    0 input error  0 short frame  0 overrun   0 underrun  0 ignored
    0 watchdog  0 bad etype drop  0 bad proto drop  0 if down drop
    0 input with dribble  0 input discard
    0 Rx pause
  TX
    121 unicast packets  769 multicast packets  7 broadcast packets
    897 output packets  73515 bytes
    0 jumbo packets
    0 output error  0 collision  0 deferred  0 late collision
    0 lost carrier  0 no carrier  0 babble  0 output discard
    0 Tx pause

SW2

hostname SW2

vlan 30

int vlan 1
ip address 172.20.0.21 255.255.254.0

int vlan 30
ip address 192.168.30.31 255.255.255.0

ip routing

ip route 172.20.0.0 255.255.254.0 172.20.1.254

int g1/0/1
switchport mode access
switchport access vlan 1
no shutdown

int g1/0/24
switchport mode access
switchport access vlan 30
no shutdown
----------------------------------------------------
SW2#show interfaces gigabitEthernet 1/0/1 
GigabitEthernet1/0/1 is up, line protocol is up (connected) 
  Hardware is Gigabit Ethernet, address is 701f.53c7.ff81 (bia 701f.53c7.ff81)
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported 
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:04, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     1034 packets input, 84323 bytes, 0 no buffer
     Received 905 broadcasts (898 multicasts)
     0 runts, 0 giants, 0 throttles 
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 898 multicast, 0 pause input
     0 input packets with dribble condition detected
     282 packets output, 40156 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
--------------------------------------------------
SW2#show interfaces gigabitEthernet 1/0/24
GigabitEthernet1/0/24 is up, line protocol is up (connected) 
  Hardware is Gigabit Ethernet, address is 701f.53c7.ff98 (bia 701f.53c7.ff98)
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported 
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:04, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 2000 bits/sec, 3 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     2066 packets input, 204444 bytes, 0 no buffer
     Received 1710 broadcasts (880 multicasts)
     0 runts, 0 giants, 0 throttles 
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 880 multicast, 0 pause input
     0 input packets with dribble condition detected
     296 packets output, 49908 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

Reza Sharifi · ‎05-10-2022

Hi,

If you are planning on keeping both switch-1 and 2 as layer-3, then you simply need to terminate vlan1 on switch-1 and vlan 30 on switch-2 and use a routed link or a vlan in access mode between the 2 switches.

server-vlan-1----switch-1------routed link------switch-2----vlan-30----client

If you are planning on keeping switch-1 as layer-2 only then you can extend vlan one all the way to switch-2 and use that switch to route between vlan-1 and vlan-30 and there is no need for a layer-3 link between the switches.

server-vlan-1----switch-1------vlan-1------switch-2----vlan-30----client

HTH

MHM Cisco World · ‎05-14-2022

https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/11072-inter-vlan-11072.html

please check this doc.
there is some limitation in using InterVLAN bridge,check cisco recommend.

note:- example in doc. is for 6500 but still can apply to NSK.