Two EX-4300 devices in virtual-chassis (master/backup RE)
VC mgmt IP: 10.232.1.100; MAC 10:0e:7e:a1:65:c0 (from the master; and from show int me0)
When debugging an intermittent mgmt ip connectivity issues (netconf/ssh) to this virtual-chassis, I noticed this on a connected ubuntu server which is acting as a gateway through which the connectivity to mgmt is established.
# tcpdump -ni ens224f1.926 'arp'
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens224f1.926, link-type EN10MB (Ethernet), capture size 262144 bytes
12:25:10.143623 ARP, Request who-has 10.232.1.100 tell 10.232.1.2, length 28
12:25:10.143877 ARP, Reply 10.232.1.100 is-at 44:f4:77:54:f4:80, length 46 <<<<
12:25:25.252111 ARP, Request who-has 10.232.1.1 tell 10.232.1.100, length 46
12:25:31.135626 ARP, Request who-has 10.232.1.100 tell 10.232.1.2, length 28
12:25:31.135948 ARP, Reply 10.232.1.100 is-at 10:0e:7e:a1:65:c0, length 46 <<<<
In the second line, note that the arp response comes with the backup device's mac address
Subsequent request gets a correct response (last line)
1. Is this a known issue?
2. I fixed the mac address on me0 with a locally administered mac; after then I didn't see any connectivity issues. Is this a right approach? Would there be any issues if master failover occurs?
> show version
fpc0:
--------------------------------------------------------------------------
Hostname: tb2-dist
Model: ex4300-48t
Junos: 19.1R3-S1
JUNOS EX Software Suite [19.1R3-S1]
JUNOS FIPS mode utilities [19.1R3-S1]
JUNOS Crypto Software Suite [19.1R3-S1]
JUNOS Online Documentation [19.1R3-S1]
JUNOS Phone-Home Software Suite [19.1R3-S1]
JUNOS jsd [powerpc-19.1R3-S1-jet-1]
JUNOS SDN Software Suite [19.1R3-S1]
JUNOS EX 4300 Software Suite [19.1R3-S1]
JUNOS Web Management Platform Package [19.1R3-S1]
JUNOS py-base-powerpc [19.1R3-S1]
JUNOS py-extensions-powerpc [19.1R3-S1]
JUNOS Openconfig [0.0.0.10-1]
fpc1:
--------------------------------------------------------------------------
Hostname: tb2-dist
Model: ex4300-24p
Junos: 19.1R3-S1
JUNOS EX Software Suite [19.1R3-S1]
JUNOS FIPS mode utilities [19.1R3-S1]
JUNOS Crypto Software Suite [19.1R3-S1]
JUNOS Online Documentation [19.1R3-S1]
JUNOS Phone-Home Software Suite [19.1R3-S1]
JUNOS jsd [powerpc-19.1R3-S1-jet-1]
JUNOS SDN Software Suite [19.1R3-S1]
JUNOS EX 4300 Software Suite [19.1R3-S1]
JUNOS Web Management Platform Package [19.1R3-S1]
JUNOS py-base-powerpc [19.1R3-S1]
JUNOS py-extensions-powerpc [19.1R3-S1]
JUNOS Openconfig [0.0.0.10-1]