Understanding Linux Network Internals 2005 phần 6 ppt

... www.oreilly.com (208.201.239. 36) 56( 84) bytes of data 64 bytes from www.oreillynet.com (208.201.239. 36) : icmp_seq=0 ttl=50 time=245 ms 64 bytes from www.oreillynet.com (208.201.239. 36) : icmp_seq=1 ttl=50 ... configuration Performance Transition from IPv4 networks to IPv6 networks Security Naturally, the committees designing the new protocol have tried to keep IPv4 and IPv6 as compatib...

Ngày tải lên: 13/08/2014, 04:21

... > 15 36) { netif_start_queue (dev); /* AKPM: redundant? */ } else { /* Interrupt us when the FIFO has room for max-sized packet. */ netif_stop_queue(dev); outw(SetTxThreshold + (15 36& gt;>2), ... needed. The more the kernel network stack was enhanced and the more features that were added (in this layer and in others), the more complex the path of a packet through the network...

Ngày tải lên: 13/08/2014, 04:21

... publisher, and ISBN. For example: " ;Understanding Linux Network Internals, by Christian Benvenuti. Copyright 20 06 O'Reilly Media, Inc., 0-5 96- 00255 -6. " This document was created by ... Section 16. 6. Bridge Device Setup Routine Section 16. 7. Deleting a Bridge Section 16. 8. Adding Ports to a Bridge Section 16. 9. Enabling and Disabling a Bridge Device...

Ngày tải lên: 13/08/2014, 04:21

... one is defined in include /linux/ mod_devicetable.h, and the other two are defined in include /linux/ pci.h. pci_device_id Device identifier. This is not a local ID used by Linux, but an ID defined ... register it. Thanks. Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 6. 6. Tuning via /proc Filesystem The /proc/pci file can be used to dump information about regi...

Ngày tải lên: 13/08/2014, 04:21

... can assume 4,0 96 different values, allows a network device, for example, to have up to 4,0 96 different bridge IDs sharing a single MAC address. Before, this would have required 4,0 96 different ... Figure 16- 2, if we added one more subnet (10.0.3.0/24) and configured eth0 with an address on it, the topology would appear to the Linux kernel routing layer like the one in Figure 16-...

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... split into 16- bit words that are summed and ones-complemented. Figure 18-13 shows an example of checksum computation on only two 16- bit words for simplicity. Linux does not sum 16- bit words, ... You cannot count on the IP ID field either, because it is a 16- bit field and can therefore wrap around pretty quickly on a fast network. Since the IP ID field plays a central role in the defr...

Ngày tải lên: 13/08/2014, 04:21

... instance. Others can take place only once. With some knowledge of networking, it is not hard to look at Figure 26- 13 in Chapter 26 and identify the transitions that belong to each of the two categories. ... only by IPv6 code: NEIGH_UPDATE_ISROUTER The neighbor is a router. This flag is used to initialize the IPv6 flag NTF_ROUTER in neighbour->flags. NEIGH_UPDATE_F_OVERRIDE_ISROUTER The...

Ngày tải lên: 13/08/2014, 04:21

... and loopback IPv4 addresses AddressesClass 10.0.0.0/81 x Class A 172. 16. 0.0/ 16 to 172.31.0.0/ 161 6 x Class B 192. 168 .0.0/ 162 56 x Class C 127.0.0.0/8 (Loopback)1 x Class A Figure 30-5 shows a topology ... include /linux/ rtnetlink.h with names of form NUD_XXX. The role of states is described in the section "Transitions Between NUD States" in Chapter 26. Figure 26- 13 in...

Ngày tải lên: 13/08/2014, 04:21

... configured subnets. For example, the command arp -s 10.0.0.1 11:22:33:44:55 :66 adds the mapping of 10.0.0.1 to 11:22:33:44:55 :66 to the ARP cache. This command would be rejected by the kernel if, according ... hash table goes from 280 elements down to 10, the size of the table will not decrease from 2 56 to 16. 34.1.2. Organization of fib_info Structures As shown in Figure 34-1, each...

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... http://www.simpopdf.com 36. 7. Files and Directories Featured in This Part of the Book Figure 36- 6 lists the files and directories referred to in the chapters in Part VII. Figure 36- 6. Files and directories ... subjects. Philip Dangler was the production editor, and Audrey Doyle was the copyeditor for Understanding Linux Network Internals. Sada Preisch proofread the book. Mary Brad...

Ngày tải lên: 13/08/2014, 04:21