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Tweaking IO Memory Allocation |
Si vous voulez bloquer ce service sur vos fils RSS
Si vous voulez nous contacter ou nous proposer un fil RSS
Menu > Articles de la revue de presse : - l'ensemble [ tous | francophone] - par mots clé [ tous] - par site [ tous] - le tagwall [ voir] - Top bi-hebdo de la revue de presse [ Voir]
Présentation : Recently I upgraded all of the community lab 1841 routers to 256 MB of DRAM. In doing so, I noticed something I hadn't before the percentage of dynamic memory DRAM allocated to input output IO memory seemed to vary among different revisions of hardware, even when they had the same modules and total amount of DRAM. This can lead to unexpected issues when implementing memory-intensive features, as was encountered by at least one lab user. To inspect the amount of memory installed in a Cisco router, look for this line toward the bottom of the show version output Router show version ... Cisco 1841 revision 6.0 with 239616K 22528K bytes of memory. ... The first number is the amount of memory available to software processes, or process memory. The second number is the remaining amount, which has been allocated for IO memory interface buffers . Adding the two numbers returns the total amount of DRAM installed 239616 KB 22528 KB 262144 KB 262144 KB 1024 256 MB If you encounter a router which seems to have a disproportionately large or small IO memory allocation, the memory-size iomem command can be used to modify it as a percentage between 5 and 50 percent in increments of 5pourcents of the total DRAM installed. Router config memory-size iomem 10 Smart-init will be disabled and new I O memory size will take effect upon reload. As indicated, this command disables smart initialization, which is responsible for automatic IO memory allocation based on the modules installed. After a reload, we can verify that the IO memory allocation has been modified, and the memory-size iomem 10 command is present in the configuration Router show version ... Cisco 1841 revision 6.0 with 235520K 26624K bytes of memory. ... Router show running-config include iomem memory-size iomem 10 IO memory allocation can be restored to its default behavior relying on smart-init by issuing the command default memory-size iomem Router config default memory-size iomem Smart-init will be enabled upon reload. Les mots clés de la revue de presse pour cet article : memory Les videos sur SecuObs pour les mots clés : memory Les éléments de la revue Twitter pour les mots clé : memory Les derniers articles du site "PacketLife.net Community Blog" :- Using 6to4 for IPv6 at Home- 6to4 IPv6 Tunneling- RFC 5798 Brings IPv6 to VRRP- The Science of Network Troubleshooting- Navigating Cisco.com Documentation- Cisco links reference in the wiki- Teaching binary and other bases- OSPFv2 versus OSPFv3- IGP posters on sale for 9.99 this week- Experimenting with VLAN hopping
Menu > Articles de la revue de presse : - l'ensemble [ tous | francophone] - par mots clé [ tous] - par site [ tous] - le tagwall [ voir] - Top bi-hebdo de la revue de presse [ Voir]
Si vous voulez bloquer ce service sur vos fils RSS :
- avec iptables "iptables -A INPUT -s 88.191.75.173 --dport 80 -j DROP"
- avec ipfw et wipfw "ipfw add deny from 88.191.75.173 to any 80"
- Nous contacter par mail
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