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+++ This bug was initially created as a clone of Bug #718169 +++ Description of problem: When add 3 vlans on systems,the third vlan's ip not properly display in arp table Version-Release number of selected component (if applicable): kernel 2.6.18-269.el5 How reproducible: always Steps to Reproduce: 1.configure 3 vlans on systems 2.ping 3 vlan interfaces 3.show arp tables Actual results: [root@hp-dl585g7-02 ~]# arp Address HWtype HWaddress Flags Mask Iface 192.168.3.1 ether 00:00:C9:B1:EA:DE C eth4.3 unused ether 00:00:C9:B1:EA:DE C eth5.5 <==== 192.168.4.1 ether 00:00:C9:B1:EA:DE C eth4.4 Expected results: "unused" should be the ip address. Additional info:
What does "arp -n" show?
(In reply to comment #2) > What does "arp -n" show? "arp -n" shows the correct arp entry.
Since the conversion of the raw IP address to the name is done in user-apce (libc), this is not a kernel issue.
per comment#4, switch to glibc component.
(In reply to comment #3) > (In reply to comment #2) > > What does "arp -n" show? > "arp -n" shows the correct arp entry. Can you please post full `arp -n` output? And then also please post output of `dig <ip_address_in_arp_output> PTR`. In my option this is DNS misconfiguration. I think you have following record in your 3.168.192.in-addr.arpa. zone: X.3.168.192.in-addr.arpa. IN PTR unused.
(In reply to comment #6) > (In reply to comment #3) > > (In reply to comment #2) > > > What does "arp -n" show? > > "arp -n" shows the correct arp entry. > > Can you please post full `arp -n` output? And then also please post output of > `dig <ip_address_in_arp_output> PTR`. I forgot to add the "-x" parameter to the dig command above. Correct command is `dig -x <ip_address_in_arp_output> PTR` > > In my option this is DNS misconfiguration. I think you have following record in > your 3.168.192.in-addr.arpa. zone: > > X.3.168.192.in-addr.arpa. IN PTR unused.
This request was evaluated by Red Hat Product Management for inclusion in the current release of Red Hat Enterprise Linux. Because the affected component is not scheduled to be updated in the current release, Red Hat is unfortunately unable to address this request at this time. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux. If you would like it considered as an exception in the current release, please ask your support representative.
Created attachment 568797 [details] "arp -n " and "dig -x ip PTR" output file
# dig -x 192.168.5.1 PTR ;; ANSWER SECTION: 1.5.168.192.in-addr.arpa. 86134 IN PTR unused. means that 1.5.168.192.in-addr.arpa. is a PTR record pointing to DNS name "unused." Am I right Adam ?
(In reply to comment #11) > # dig -x 192.168.5.1 PTR > ;; ANSWER SECTION: > 1.5.168.192.in-addr.arpa. 86134 IN PTR unused. > > means that 1.5.168.192.in-addr.arpa. is a PTR record pointing to DNS name > "unused." Am I right Adam ? Right you are. Which means that arp behaves as expected...
Thanks, closing per previous comment.