Those counters do not represent the number of packets, but sessions
created on a relay.  I believe the text has been erroneously copied from
the "redirects" counters.

Index: OPENBSD-RELAYD-MIB.txt
===================================================================
RCS file: /home/cvs/src/share/snmp/OPENBSD-RELAYD-MIB.txt,v
diff -u -p -r1.3 OPENBSD-RELAYD-MIB.txt
--- OPENBSD-RELAYD-MIB.txt	15 Oct 2015 19:18:01 -0000	1.3
+++ OPENBSD-RELAYD-MIB.txt	6 May 2025 17:03:08 -0000
@@ -32,10 +32,12 @@ IMPORTS
 		FROM SNMPv2-CONF;
 
 relaydMIBObjects MODULE-IDENTITY
-	LAST-UPDATED	"201510152116Z"
+	LAST-UPDATED	"202505161916Z"
 	ORGANIZATION	"OpenBSD"
 	CONTACT-INFO	""
 	DESCRIPTION 	"The MIB module for gathering relayd status information"
+	REVISION	"202505161916Z"
+	DESCRIPTION	"Fix description of relay counters"
 	REVISION	"201510152116Z"
 	DESCRIPTION	"Add missing comma, and missing range restriction for
 	relaydSessionRelayIndex"
@@ -235,7 +237,7 @@ relaydRelayAvg OBJECT-TYPE
 	MAX-ACCESS	read-only
 	STATUS		current
 	DESCRIPTION
-	"Average number of packets passed via this relay per statistics interval"
+	"Average number of sessions created on this relay per statistics interval"
 	::= { relaydRelayEntry 5 }
 
 relaydRelayLast OBJECT-TYPE
@@ -243,7 +245,7 @@ relaydRelayLast OBJECT-TYPE
 	MAX-ACCESS	read-only
 	STATUS		current
 	DESCRIPTION
-	"Number of packets passed via this relay in the current statistics interval"
+	"Number of sessions created on this relay in the current statistics interval"
 	::= { relaydRelayEntry 6 }
 
 relaydRelayAvgHour OBJECT-TYPE
@@ -251,7 +253,7 @@ relaydRelayAvgHour OBJECT-TYPE
 	MAX-ACCESS	read-only
 	STATUS		current
 	DESCRIPTION
-	"Average number of packets passed via this relay per hour"
+	"Average number of sessions created on this relay per hour"
 	::= { relaydRelayEntry 7 }
 
 relaydRelayLastHour OBJECT-TYPE
@@ -259,7 +261,7 @@ relaydRelayLastHour OBJECT-TYPE
 	MAX-ACCESS	read-only
 	STATUS		current
 	DESCRIPTION
-	"Number of packets passed via this relay in the previous hour"
+	"Number of sessions created on this relay in the previous hour"
 	::= { relaydRelayEntry 8 }
 
 relaydRelayAvgDay OBJECT-TYPE
@@ -267,7 +269,7 @@ relaydRelayAvgDay OBJECT-TYPE
 	MAX-ACCESS	read-only
 	STATUS		current
 	DESCRIPTION
-	"Average number of packets passed via this relay per day"
+	"Average number of sessions created on this relay per day"
 	::= { relaydRelayEntry 9 }
 
 relaydRelayLastDay OBJECT-TYPE
@@ -275,7 +277,7 @@ relaydRelayLastDay OBJECT-TYPE
 	MAX-ACCESS	read-only
 	STATUS		current
 	DESCRIPTION
-	"Number of packets passed via this relay in the previous day"
+	"Number of sessions created on this relay in the previous day"
 	::= { relaydRelayEntry 10 }
 
 --