Hi all To make it clearer , i don't have a problem with default route on R1 i have a problem with the default route on R2 and R3
best regards --Ibrahim On Tue, Aug 18, 2009 at 10:24 AM, Ibrahim Abo Zaid < [email protected]> wrote: > Hi All > > R1 isn't setting ATT bit in its LSP it is like that R1 forwards L1 default > route to all its L1 neighbors in DEF the originatation area (but it is not > shown in R1-LSP) , I connected R4 to R1 with L2 ADJ between them and there > is no DEF route !! > > any explainsion ? > > > R1#sh isis database > IS-IS Level-1 Link State Database: > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > > R1.00-00 * 0x00000003 0xD80B 1161 0/0/0 > R2.00-00 0x00000003 0xDE59 1165 1/0/0 > R3.00-00 0x00000003 0xDF77 1165 1/0/0 > > R1#sh isis database R1.00-00 detail > > IS-IS Level-1 LSP R1.00-00 > > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > > R1.00-00 * 0x00000007 0x2B0C 629 0/0/0 > Area Address: 49.0001 > NLPID: 0xCC > Hostname: R1 > IP Address: 10.10.13.1 > Metric: 10 IP 10.10.12.0/24 > Metric: 10 IP 10.10.13.0/24 > Metric: 10 IS-Extended R3.00 > Metric: 10 IS-Extended R2.00 > > IS-IS Level-2 LSP R1.00-00 > > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > > R1.00-00 * 0x00000005 0x6E68 1199 0/0/0 > Area Address: 49.0001 > NLPID: 0xCC > Hostname: R1 > IP Address: 10.10.13.1 > Metric: 10 IP 10.14.1.0/24 > Metric: 10 IS-Extended R4.01 > Metric: 10 IP 10.10.12.2/32 > Metric: 10 IP 10.10.12.0/24 > Metric: 10 IP 10.10.13.3/32 > Metric: 10 IP 10.10.13.0/24 > > > > R2#sh isis database > Area 2: > IS-IS Level-2 Link State Database: > > LSPID LSP Seq Num LSP Checksum LSP Holdtime > ATT/P/OL > > R2.00-00 * 0x00000004 0x6D77 1156 0/0/0 > R3.00-00 0x00000004 0x934E 1154 0/0/0 > Area null: > > IS-IS Level-1 Link State Database: > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > > R1.00-00 0x00000003 0xD80B 1143 0/0/0 > R2.00-00 * 0x00000003 0xDE59 1150 1/0/0 > R3.00-00 0x00000003 0xDF77 1147 1/0/0 > R3#sh isis database > Area 3: > IS-IS Level-2 Link State Database: > > LSPID LSP Seq Num LSP Checksum LSP Holdtime > ATT/P/OL > > R2.00-00 0x00000004 0x6D77 1137 0/0/0 > R3.00-00 * 0x00000004 0x934E 1138 0/0/0 > Area null: > > IS-IS Level-1 Link State Database: > LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL > > R1.00-00 0x00000003 0xD80B 1125 0/0/0 > R2.00-00 0x00000003 0xDE59 1129 1/0/0 > R3.00-00 * 0x00000003 0xDF77 1132 1/0/0 > > On Tue, Aug 18, 2009 at 1:51 AM, BRYAN BARTIK <[email protected]> wrote: > >> Hello, >> >> Do a "show isis database" and you will see who is setting the ATT bit. R2 >> and R3 are setting the ATT bits and these get flooded to R1 and then across >> to each other in L1. Probably looks like this: >> >> R1#sho isis database >> >> IS-IS Level-1 Link State Database: >> LSPID LSP Seq Num LSP Checksum LSP Holdtime >> ATT/P/OL >> R1.00-00 * 0x00000003 0x5524 1173 0/0/0 >> R2.00-00 0x00000003 0x7E42 1161 1/0/0 >> R3.00-00 0x00000003 0xC8F2 1179 1/0/0 >> >> -Bryan >> >> -----Original Message----- >> From: [email protected] [mailto: >> [email protected]] On Behalf Of Ibrahim Abo Zaid >> Sent: Monday, August 17, 2009 2:47 PM >> To: cisco_nsp; [email protected] >> Subject: [c-nsp] ISIS Problem >> >> Hi All >> >> I have a problem with the below ISIS toplogy , All ADJ of R1 are L1 and >> interface between R2 is in A2 from R2 side and in A3 side from R3 side >> so R2 and R3 have L2-ADJ betwene them , as expected both R2 and R3 send >> LSP >> with ATT bit set so R1 has 2 L1 default routes point to both R2 and R3 , >> the >> wired result there is L1 on both R2 and R3 points to R1 !! but R1 don't >> set >> ATT bit in its LSP >> >> do you explainsation why R1 sends this default route ? and how we can stop >> it >> >> Topology >> >> R2--------L-1------------ >> | | >> | | >> L2 A-1 R1 >> | | >> | | >> R3---------L-1----------- >> >> Configuration >> >> R1 >> >> ! >> interface Serial1/0 >> description to R2 >> ip address 10.10.12.1 255.255.255.0 >> ip router isis >> encapsulation ppp >> ! >> interface Serial1/1 >> description to R3 >> ip address 10.10.13.1 255.255.255.0 >> ip router isis >> encapsulation ppp >> ! >> router isis >> net 49.0001.0000.0000.0001.00 >> is-type level-1 >> >> >> R2 >> >> interface Serial1/0 >> description to R1 >> ip address 10.10.12.2 255.255.255.0 >> ip router isis >> encapsulation ppp >> ! >> interface Serial1/1 >> description to R3 >> ip address 10.10.23.2 255.255.255.0 >> ip router isis 2 >> encapsulation ppp >> ! >> router isis 2 >> net 49.0002.0000.0000.0002.00 >> is-type level-2-only >> ! >> router isis >> net 49.0001.0000.0000.0002.00 >> is-type level-1 >> >> >> R3 >> >> interface Serial 1/0 >> description to R1 >> ip address 10.10.13.3 255.255.255.0 >> ip router isis >> encapsulation ppp >> ! >> interface Serial 1/1 >> description to R2 >> ip address 10.10.23.3 255.255.255.0 >> ip router isis 3 >> encapsulation ppp >> ! >> router isis 3 >> net 49.0003.0000.0000.0003.00 >> is-type level-2-only >> ! >> router isis >> net 49.0001.0000.0000.0003.00 >> is-type level-1 >> >> >> Logs >> ------- >> >> >> R1#sh clns neighbors >> System Id Interface SNPA State Holdtime Type >> Protocol >> R2 Se1/0 *PPP* Up 22 L1 IS-IS >> R3 Se1/1 *PPP* Up 23 L1 IS-IS >> >> >> R2#sh clns neighbors >> Area 2: >> System Id Interface SNPA State Holdtime Type >> Protocol >> R3 Se1/1 *PPP* Up 28 L2 IS-IS >> Area null: >> System Id Interface SNPA State Holdtime Type >> Protocol >> R1 Se1/0 *PPP* Up 26 L1 IS-IS >> >> >> R3#sh clns neighbors >> Area 3: >> System Id Interface SNPA State Holdtime Type >> Protocol >> R2 Se1/1 *PPP* Up 22 L2 IS-IS >> Area null: >> System Id Interface SNPA State Holdtime Type >> Protocol >> R1 Se1/0 *PPP* Up 28 L1 IS-IS >> >> routing tables >> ----------------- >> >> R1#sh ip route isis >> i*L1 0.0.0.0/0 [115/10] via 10.10.13.3, Serial1/1 >> [115/10] via 10.10.12.2, Serial1/0 >> >> R2#sh ip route isis >> i L2 10.10.13.1/32 [115/20] via 10.10.23.3, Serial1/0 >> i L1 10.10.13.0/24 [115/20] via 10.10.12.1, Serial1/0 >> i*L1 0.0.0.0/0 [115/20] via 10.10.12.1, Serial1/0 >> >> >> R3#sh ip route isis >> i L1 10.10.12.0/24 [115/20] via 10.10.13.1, Serial1/0 >> i L2 10.10.12.1/32 [115/20] via 10.10.23.2, Serial1/1 >> i*L1 0.0.0.0/0 [115/20] via 10.10.13.1, Serial1/0 >> _______________________________________________ >> cisco-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/cisco-nsp >> archive at http://puck.nether.net/pipermail/cisco-nsp/ >> > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
