[j-nsp] Juniper M20 SSB-E issue

[Josef Buchsteiner]

Sunday, January 28, 2007, 4:48:52 PM, you wrote:

ER>    
ER>    
ER> Hi all,
ER>  
ER>  
ER>  
ER>  I have a lot of hold entries in my forwarding table,  how can I get rid of
ER>  them or prevent them to be added in my forwarding-table?

     as  long as the system tries to send traffic to destinations
     which  do  not  respond  to  arp  requests you will see hold
     entries.  The number of such entries is limited and also the
     amount of traffic tried to send to unresolved destination is
     throttled. So this is not a concern as such.

     looks  like  somebody  is  scanning  the subnet. Which Junos
     version are you using ?

     You  say you reload the SSB every 4 weeks which means memory
     is getting either depleted or fragmented. Can you get me
     the "show heap 0" from the SSB before you restart the SSB

     thanks
     Josef

     

ER>  
ER>  Because this is eating my jtree memory on the SSB of the router and I need
ER>  to reload my SSB each 4 weeks.
ER>  
ER>  
ER>  
ER>  how route forwarding-table | match hold
ER>  
ER>  62.41.27.168/32    dest     0 62.41.27.168       hold  2518 1 ae0.29
ER>  
ER>  62.41.27.224/32    dest     0 62.41.27.224       hold   772 1 ae0.29
ER>  
ER>  62.41.27.231/32    dest     0 62.41.27.231       hold  2738 1 ae0.29
ER>  
ER>  62.41.27.232/32    dest     0 62.41.27.232       hold   791 1 ae0.29
ER>  
ER>  62.41.27.236/32    dest     0 62.41.27.236       hold   857 1 ae0.29
ER>  
ER>  62.41.27.237/32    dest     0 62.41.27.237       hold  3036 1 ae0.29
ER>  
ER>  62.41.27.241/32    dest     0 62.41.27.241       hold  2910 1 ae0.29
ER>  
ER>  62.41.27.242/32    dest     0 62.41.27.242       hold  2794 1 ae0.29
ER>  
ER>  62.41.27.248/32    dest     0 62.41.27.248       hold   908 1 ae0.29
ER>  
ER>  62.41.27.249/32    dest     0 62.41.27.249       hold   816 1 ae0.29
ER>  
ER>  62.41.27.250/32    dest     0 62.41.27.250       hold  2970 1 ae0.29
ER>  
ER>  62.41.27.251/32    dest     0 62.41.27.251       hold  2121 1 ae0.29
ER>  
ER>  62.41.27.252/32    dest     0 62.41.27.252       hold   883 1 ae0.29
ER>  
ER>  62.41.27.253/32    dest     0 62.41.27.253       hold   699 1 ae0.29
ER>  
ER>  
ER>  
ER>  For example we have configured 62.41.27.0/24 on interface ae0.29; The hosts
ER>  62.41.27.1-167 are up and 62.41.27.168-253 are down
ER>  
ER>  so the router doesn't know where  to deliver these packets because the
ER>  destination address is down. So it creates a next-hop hold entry in our
ER>  forwarding table.
ER>  
ER>  
ER>  
ER>  Looking forward for your replies.
ER>  
ER>  
ER>  
ER>  Best regards,
ER>  
ER>  Reinier van Eeden
ER>  
ER>  Ecatel LTD.
ER>  
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ER>   
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