Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
DescriptionOlivier Fourdan
2010-08-26 12:22:37 UTC
Description of problem:
When using IPV6-MIB to query the count and description of IPV6 interfaces, only the interfaces up at the time of startup or first query are reported, any interface activated after is not reported.
Version-Release number of selected component (if applicable):
net-snmp-5.5-19.el6
How reproducible:
Always
Steps to Reproduce:
1. Make multiple network interfaces are configured on the system, but only one is active
2. Start wnmpd
# service snmpd start
2. Query the description of IPV6 interfaces
# snmpwalk -c public -v 1 localhost ipv6IfDescr
IPV6-MIB::ipv6IfDescr.1 = STRING: lo
IPV6-MIB::ipv6IfDescr.2 = STRING: eth0
3. Check that against /proc/net/if_inet6 and verify that all interfaces are listed:
# cat /proc/net/if_inet6
00000000000000000000000000000001 01 80 10 80 lo
fe80000000000000565200fffe62b298 02 40 20 80 eth0
4. Start another network interface
# ifup eth1
Determining IP information for eth1... done.
5. Verify that the itnerface is now listed in /proc/net/if_inet6
# cat /proc/net/if_inet6
00000000000000000000000000000001 01 80 10 80 lo
fe80000000000000565200fffe62b298 02 40 20 80 eth0
fe80000000000000565200fffe7fb5b4 03 40 20 80 eth1
6. Redo the snmpwalk query
# snmpwalk -c public -v 1 localhost ipv6IfDescr
IPV6-MIB::ipv6IfDescr.1 = STRING: lo
IPV6-MIB::ipv6IfDescr.2 = STRING: eth0
Actual results:
The last started interface (eth1) is not listed
Expected results:
All IPV6 interfaces are listed
Additional info:
The same goes for the count if interfaces (snmpwalk -c public -v 1 localhost ipv6Interfaces)
However, an existing interface being taken down is not reported:
1. Start with 3 interfaces:
# cat /proc/net/if_inet6
00000000000000000000000000000001 01 80 10 80 lo
fe80000000000000565200fffe62b298 02 40 20 80 eth0
fe80000000000000565200fffe7fb5b4 03 40 20 80 eth1
2. Restart snmpd to sure all 3 interfaces are known:
# service snmpd restart
# snmpwalk -c public -v 1 localhost ipv6IfDescr
IPV6-MIB::ipv6IfDescr.1 = STRING: lo
IPV6-MIB::ipv6IfDescr.2 = STRING: eth0
IPV6-MIB::ipv6IfDescr.3 = STRING: eth1
3. Bring one interfce down
# ifdown eth1
4. Check /proc/net/if_inet6 again
# cat /proc/net/if_inet6
00000000000000000000000000000001 01 80 10 80 lo
fe80000000000000565200fffe62b298 02 40 20 80 eth0
5. Check ipv6IfAdminStatus
# snmpwalk -c public -v 1 localhost ipv6IfAdminStatus
IPV6-MIB::ipv6IfAdminStatus.1 = INTEGER: up(1)
IPV6-MIB::ipv6IfAdminStatus.2 = INTEGER: up(1)
IPV6-MIB::ipv6IfAdminStatus.3 = INTEGER: down(2)
This time eth1 is reported as "down" as expected. So the problem is that the list of interfaces is not refreshed when a new interface is activated.
Note: This issue seems to be affecting el5 as well.
ipv6IfTable is indeed broken, its rows are never updated - i.e. when an new interface shows up, it is not added to the table. The only thing that updates is state of the rows.
It applies also to current upstream SVN trunk.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
http://rhn.redhat.com/errata/RHBA-2011-0729.html
Description of problem: When using IPV6-MIB to query the count and description of IPV6 interfaces, only the interfaces up at the time of startup or first query are reported, any interface activated after is not reported. Version-Release number of selected component (if applicable): net-snmp-5.5-19.el6 How reproducible: Always Steps to Reproduce: 1. Make multiple network interfaces are configured on the system, but only one is active 2. Start wnmpd # service snmpd start 2. Query the description of IPV6 interfaces # snmpwalk -c public -v 1 localhost ipv6IfDescr IPV6-MIB::ipv6IfDescr.1 = STRING: lo IPV6-MIB::ipv6IfDescr.2 = STRING: eth0 3. Check that against /proc/net/if_inet6 and verify that all interfaces are listed: # cat /proc/net/if_inet6 00000000000000000000000000000001 01 80 10 80 lo fe80000000000000565200fffe62b298 02 40 20 80 eth0 4. Start another network interface # ifup eth1 Determining IP information for eth1... done. 5. Verify that the itnerface is now listed in /proc/net/if_inet6 # cat /proc/net/if_inet6 00000000000000000000000000000001 01 80 10 80 lo fe80000000000000565200fffe62b298 02 40 20 80 eth0 fe80000000000000565200fffe7fb5b4 03 40 20 80 eth1 6. Redo the snmpwalk query # snmpwalk -c public -v 1 localhost ipv6IfDescr IPV6-MIB::ipv6IfDescr.1 = STRING: lo IPV6-MIB::ipv6IfDescr.2 = STRING: eth0 Actual results: The last started interface (eth1) is not listed Expected results: All IPV6 interfaces are listed Additional info: The same goes for the count if interfaces (snmpwalk -c public -v 1 localhost ipv6Interfaces) However, an existing interface being taken down is not reported: 1. Start with 3 interfaces: # cat /proc/net/if_inet6 00000000000000000000000000000001 01 80 10 80 lo fe80000000000000565200fffe62b298 02 40 20 80 eth0 fe80000000000000565200fffe7fb5b4 03 40 20 80 eth1 2. Restart snmpd to sure all 3 interfaces are known: # service snmpd restart # snmpwalk -c public -v 1 localhost ipv6IfDescr IPV6-MIB::ipv6IfDescr.1 = STRING: lo IPV6-MIB::ipv6IfDescr.2 = STRING: eth0 IPV6-MIB::ipv6IfDescr.3 = STRING: eth1 3. Bring one interfce down # ifdown eth1 4. Check /proc/net/if_inet6 again # cat /proc/net/if_inet6 00000000000000000000000000000001 01 80 10 80 lo fe80000000000000565200fffe62b298 02 40 20 80 eth0 5. Check ipv6IfAdminStatus # snmpwalk -c public -v 1 localhost ipv6IfAdminStatus IPV6-MIB::ipv6IfAdminStatus.1 = INTEGER: up(1) IPV6-MIB::ipv6IfAdminStatus.2 = INTEGER: up(1) IPV6-MIB::ipv6IfAdminStatus.3 = INTEGER: down(2) This time eth1 is reported as "down" as expected. So the problem is that the list of interfaces is not refreshed when a new interface is activated. Note: This issue seems to be affecting el5 as well.