This article describes the issue of the VRRP PDU interface's statistics advertisement not always correctly populating the count. The VRRP PDU statistics, which displays the interface's advertisement for sent and/or received, is displaying the count as 0 or in certain cases, it will display a negative count. This issue is due to a software bug or in certain cases, the sent … [Read more...]
VRRP mastership switchover taking too long
VRRP mastership switch over is usually completed instantaneously, but sometimes it takes longer. While testing VRRP mastership switch over multiple times by deleting logical interface, a large delay (20-30 seconds) is observed in VRRP mastership switch over. This slow VRRP convergence can sometimes happen because the current master router cannot send out a VRRP packet with … [Read more...]
Juniper: What to look for when there is VRRP master change issue
This article describes the issue of the Virtual Router Redundancy Protocol (VRRP) backup changing to the master role, without any operation. Also, at this time, both devices running VRRP will become master. In certain cases, as per VRRP traceoptions, it is seen that VRRP backup changes to the master role as it receives the PPMP_PACKET_ADJ_DOWN received message: Dec 3 … [Read more...]
When VRRP option “no-preempt” is added and commit, the device becomes “backup”
By default with VRRP in Junos, a device with higher priority takes "preemption" and becomes master. When preemption is not preferred, an option "no-preempt" could be added into the configuration. This article describes the VRRP state change when this option is added and committed. After adding the "no-preempt" option and committing, the device`s VRRP state becomes … [Read more...]
VLAN firewall filter and VRRP packet processing in EX switch
This article describes how VRRP packets are processed in EX switch while a firewall filter is applied on input direction of a VLAN. Firewall filter applied in input direction of a VLAN blocks the transit VRRP multicast packets . On the EX switch packet filtering always happens in the hardware. If there is a filter applied in input direction of a VLAN then each packet has … [Read more...]
VRRPD_MISSING_VIP
The indicated interface received a Virtual Routing Redundancy Protocol (VRRP) packet for the specified VRRP group in which the indicated Virtual IP (VIP) address was missing. The VRRPD_MISSING_VIP message is logged when a packet arrives for a VRRP group that has the wrong VIP or no VIP specified. The error will look similar to the following: VRRPD_MISSING_VIP: Packet … [Read more...]