On Mon, Sep 26, 2011 at 1:39 PM, Brent Jones <[email protected]> wrote: > Did you observe any strange entries in /var/log/shadow when these events > occur? > I've had similar issues, where some EX4200's in a VC lose the ARP > table, and traffic cannot transit the switch to another switch (if the > traffic must go through that VCP). > JTAC was unable to find any root cause, but there were number errors > in /var/log/shadow about the ASIC forwarding table didn't match what > was in software/memory
No, the only entries present in /var/log/shadow.log are the mysterious "Non RTG error" messages that it logs every ~5.5 minutes. In this instance, the VC contains two EX4200-48T and both switches have identical halp-nh arp-table data, with both missing the same entries. What the root cause is, who knows; but if Juniper wanted to provide me with a "fix" they could make "clear arp" actually clear the arp entries. This happens so rarely that it's only a problem because the obvious fix that NOC guys try before escalating does not work. I am hoping a future instance of this problem will get escalated to me so I can try installing a static ARP entry with a different MAC and then removing it, which should correct the problem without impacting other machines on the subnet. -- Jeff S Wheeler <[email protected]> Sr Network Operator / Innovative Network Concepts _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
