This article describes an issue where the "show pfe route summary hw" output displays incorrect capacity on the QFX5200 platform. Due to this display issue, the Used count may exceed the Max count.
Incorrect capacity is displayed in the output of the "show pfe route summary hw" command.
The below output is taken from a QFX5200 running 22.4R3-S5 configured with lpm-profile.
Junos 22.4R3-S5: root@qfx5200> > show pfe route summary hwProfile active: lpm-profile Type Max Used Free % free ---------------------------------------------------- IPv4 Host 8192 8184 0 0.00 IPv4 LPM 131072 181843 0 0.00 >>>>> Used > Max IPv4 Mcast 4096 0 0 0.00 IPv6 Host 4096 4 0 0.00 IPv6 LPM(< 64) 16384 4 16380 99.98 IPv6 LPM(> 64) 16384 0 16384 100.00 IPv6 Mcast 2048 0 0 0.00
Due to a display issue, the "show pfe route summary hw" output shows incorrect capacity. As a result, the Used count may exceed the Max count, as indicated in the symptom field. This does not impact functionality. PR 1858920 addresses this issue. Refer to the PR or contact JTAC for a list of releases that include the fix.
For example, on a QFX5200 configured with lpm-profile, the IPv4 LPM Max capacity is incorrectly displayed as 131072 in releases that do not include the fix for this PR (e.g., 22.4R3-S5). However, the actual capacity is 196608, which is correctly reflected in releases that contain the fix (e.g., 22.4R3-S6).
Route install failure in HW can be identified through "route add failed" and "Table full" log messages.
Junos 22.4R3-S6:
root@qfx5200> > show pfe route summary hwProfile active: lpm-profile Type Max Used Free % free ---------------------------------------------------- IPv4 Host 8192 6546 1638 20.00 IPv4 LPM 196608 183481 13127 6.68 <<<<< Max updated IPv4 Mcast 4096 0 819 20.00 IPv6 Host 4096 4 819 20.00 IPv6 LPM(< 64) 32768 4 32764 99.99 IPv6 LPM(> 64) 32768 0 32768 100.00 IPv6 Mcast 2048 0 410 20.02