Frame Relay Map Help
I am working through Caslow's Bridges Router and Switches book and I am trying to get a firm understanding of frame-relay. I have generally recreated the lab on page 126 with the minor changes of adding another router and changing addresses. For those without the book (which is very good by the way) this is frame on physical interfaces in a hub and spoke configuration. The hub can ping all spokes, and each spoke can ping the hub. However, spokes can not ping each other until the 'frame-relay map ip" statement is added to point to each spoke. Everything can now ping everything else. Now we save the configs and reload. Since map statements have not been added on the spokes to point to the hub (since they were originally learned dynamically) I expect that dynamic inverse arp to be disabled, and there will be no dynamic entries on the spokes for the same protocol and the same dlci. This is not the case in my lab here is the relevant part of the config on one spoke, and the results of 'show frame-relay map' interface Serial1 ip address 192.168.14.2 255.255.255.0 encapsulation frame-relay frame-relay map ip 192.168.14.3 201 frame-relay map ip 192.168.14.4 201 no frame-relay inverse-arp Router2#sho frame-relay map Serial1 (up): ip 192.168.14.1 dlci 201(0xC9,0x3090), dynamic, broadcast,, status defined, active Serial1 (up): ip 192.168.14.3 dlci 201(0xC9,0x3090), static, CISCO, status defined, active Serial1 (up): ip 192.168.14.4 dlci 201(0xC9,0x3090), static, CISCO, status defined, active Can someone explain why this is happening? (also explain how disabling frame-realy inverse arp works since I get similar results). Thanks Ed Edward Moss, CCNP, CCDP _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Frame Relay Map Help
well, read that chapter carefully, I have difficult on understanding when I first read it Sam Li - Original Message - From: Ed Moss <[EMAIL PROTECTED]> Newsgroups: groupstudy.cisco To: <[EMAIL PROTECTED]> Sent: Tuesday, October 24, 2000 10:34 PM Subject: Frame Relay Map Help > I am working through Caslow's Bridges Router and Switches book and I am > trying to get a firm understanding of frame-relay. > > I have generally recreated the lab on page 126 with the minor changes of > adding another router and changing addresses. For those without the book > (which is very good by the way) this is frame on physical interfaces in a > hub and spoke configuration. > > The hub can ping all spokes, and each spoke can ping the hub. However, > spokes can not ping each other until the 'frame-relay map ip" statement is > added to point to each spoke. > > Everything can now ping everything else. Now we save the configs and > reload. > > Since map statements have not been added on the spokes to point to the hub > (since they were originally learned dynamically) I expect that dynamic > inverse arp to be disabled, and there will be no dynamic entries on the > spokes for the same protocol and the same dlci. > > This is not the case in my lab here is the relevant part of the config > on one spoke, and the results of 'show frame-relay map' > > interface Serial1 > ip address 192.168.14.2 255.255.255.0 > encapsulation frame-relay > frame-relay map ip 192.168.14.3 201 > frame-relay map ip 192.168.14.4 201 > no frame-relay inverse-arp > > Router2#sho frame-relay map > Serial1 (up): ip 192.168.14.1 dlci 201(0xC9,0x3090), dynamic, > broadcast,, status defined, active > Serial1 (up): ip 192.168.14.3 dlci 201(0xC9,0x3090), static, > CISCO, status defined, active > Serial1 (up): ip 192.168.14.4 dlci 201(0xC9,0x3090), static, > CISCO, status defined, active > > Can someone explain why this is happening? (also explain how disabling > frame-realy inverse arp works since I get similar results). > > Thanks > Ed > > Edward Moss, CCNP, CCDP > > > > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Frame Relay Map Help
Try 'clear frame' on the spoke router, see if it still works. If that does do it, save the config and reload the spoke router. George Zhang Sam LI wrote: > well, read that chapter carefully, I have difficult on understanding when I > first read it > > Sam Li > > - Original Message - > From: Ed Moss <[EMAIL PROTECTED]> > Newsgroups: groupstudy.cisco > To: <[EMAIL PROTECTED]> > Sent: Tuesday, October 24, 2000 10:34 PM > Subject: Frame Relay Map Help > > > I am working through Caslow's Bridges Router and Switches book and I am > > trying to get a firm understanding of frame-relay. > > > > I have generally recreated the lab on page 126 with the minor changes of > > adding another router and changing addresses. For those without the book > > (which is very good by the way) this is frame on physical interfaces in a > > hub and spoke configuration. > > > > The hub can ping all spokes, and each spoke can ping the hub. However, > > spokes can not ping each other until the 'frame-relay map ip" statement is > > added to point to each spoke. > > > > Everything can now ping everything else. Now we save the configs and > > reload. > > > > Since map statements have not been added on the spokes to point to the hub > > (since they were originally learned dynamically) I expect that dynamic > > inverse arp to be disabled, and there will be no dynamic entries on the > > spokes for the same protocol and the same dlci. > > > > This is not the case in my lab here is the relevant part of the config > > on one spoke, and the results of 'show frame-relay map' > > > > interface Serial1 > > ip address 192.168.14.2 255.255.255.0 > > encapsulation frame-relay > > frame-relay map ip 192.168.14.3 201 > > frame-relay map ip 192.168.14.4 201 > > no frame-relay inverse-arp > > > > Router2#sho frame-relay map > > Serial1 (up): ip 192.168.14.1 dlci 201(0xC9,0x3090), dynamic, > > broadcast,, status defined, active > > Serial1 (up): ip 192.168.14.3 dlci 201(0xC9,0x3090), static, > > CISCO, status defined, active > > Serial1 (up): ip 192.168.14.4 dlci 201(0xC9,0x3090), static, > > CISCO, status defined, active > > > > Can someone explain why this is happening? (also explain how disabling > > frame-realy inverse arp works since I get similar results). > > > > Thanks > > Ed > > > > Edward Moss, CCNP, CCDP > > > > > > > > > > _ > > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Frame Relay Map Help
Edward, Do you also have inverse arp disabled at the hub router? If not this would explain why the remotes/spokes are still getting the info dynamically. I could be wrong... but I'm very often not right. Cory -Original Message- From: George Zhang [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 25, 2000 9:20 PM To: [EMAIL PROTECTED] Subject: Re: Frame Relay Map Help Try 'clear frame' on the spoke router, see if it still works. If that does do it, save the config and reload the spoke router. George Zhang Sam LI wrote: > well, read that chapter carefully, I have difficult on understanding when I > first read it > > Sam Li > > - Original Message - > From: Ed Moss <[EMAIL PROTECTED]> > Newsgroups: groupstudy.cisco > To: <[EMAIL PROTECTED]> > Sent: Tuesday, October 24, 2000 10:34 PM > Subject: Frame Relay Map Help > > > I am working through Caslow's Bridges Router and Switches book and I am > > trying to get a firm understanding of frame-relay. > > > > I have generally recreated the lab on page 126 with the minor changes of > > adding another router and changing addresses. For those without the book > > (which is very good by the way) this is frame on physical interfaces in a > > hub and spoke configuration. > > > > The hub can ping all spokes, and each spoke can ping the hub. However, > > spokes can not ping each other until the 'frame-relay map ip" statement is > > added to point to each spoke. > > > > Everything can now ping everything else. Now we save the configs and > > reload. > > > > Since map statements have not been added on the spokes to point to the hub > > (since they were originally learned dynamically) I expect that dynamic > > inverse arp to be disabled, and there will be no dynamic entries on the > > spokes for the same protocol and the same dlci. > > > > This is not the case in my lab here is the relevant part of the config > > on one spoke, and the results of 'show frame-relay map' > > > > interface Serial1 > > ip address 192.168.14.2 255.255.255.0 > > encapsulation frame-relay > > frame-relay map ip 192.168.14.3 201 > > frame-relay map ip 192.168.14.4 201 > > no frame-relay inverse-arp > > > > Router2#sho frame-relay map > > Serial1 (up): ip 192.168.14.1 dlci 201(0xC9,0x3090), dynamic, > > broadcast,, status defined, active > > Serial1 (up): ip 192.168.14.3 dlci 201(0xC9,0x3090), static, > > CISCO, status defined, active > > Serial1 (up): ip 192.168.14.4 dlci 201(0xC9,0x3090), static, > > CISCO, status defined, active > > > > Can someone explain why this is happening? (also explain how disabling > > frame-realy inverse arp works since I get similar results). > > > > Thanks > > Ed > > > > Edward Moss, CCNP, CCDP > > > > > > > > > > _ > > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Frame Relay Map Help
No, Inverse arp at the hub is still active. Since there is a frame map statement on the spokes, I expect that inverse arp would be disabled for the protocol (IP) and the dlci as Cisco's documentation states. Caslow's book shows that the spoke router would lose the dynamic maps. On the other hand the hub has no idea of the spoke's map statement... and will still send its info down the serial line the spoke router will hear the info and associate the IP with the dlci. This is the only rationalization I have as to why the spoke router still gets the dynamic info. Ed "Stull, Cory" <[EMAIL PROTECTED]> wrote in message 0D7A05A19CE4D211BD050008C7330FE71F4399@CCUPDC">news:0D7A05A19CE4D211BD050008C7330FE71F4399@CCUPDC... > Edward, > > Do you also have inverse arp disabled at the hub router? If not this would > explain why the remotes/spokes are still getting the info dynamically. I > could be wrong... but I'm very often not right. > > Cory > > -Original Message- > From: George Zhang [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, October 25, 2000 9:20 PM > To: [EMAIL PROTECTED] > Subject: Re: Frame Relay Map Help > > > Try 'clear frame' on the spoke router, see if it still works. If that does > do it, save > the config and reload the spoke router. > > George Zhang > > Sam LI wrote: > > > well, read that chapter carefully, I have difficult on understanding when > I > > first read it > > > > Sam Li > > > > - Original Message - > > From: Ed Moss <[EMAIL PROTECTED]> > > Newsgroups: groupstudy.cisco > > To: <[EMAIL PROTECTED]> > > Sent: Tuesday, October 24, 2000 10:34 PM > > Subject: Frame Relay Map Help > > > > > I am working through Caslow's Bridges Router and Switches book and I am > > > trying to get a firm understanding of frame-relay. > > > > > > I have generally recreated the lab on page 126 with the minor changes of > > > adding another router and changing addresses. For those without the > book > > > (which is very good by the way) this is frame on physical interfaces i n > a > > > hub and spoke configuration. > > > > > > The hub can ping all spokes, and each spoke can ping the hub. However, > > > spokes can not ping each other until the 'frame-relay map ip" statement > is > > > added to point to each spoke. > > > > > > Everything can now ping everything else. Now we save the configs and > > > reload. > > > > > > Since map statements have not been added on the spokes to point to the > hub > > > (since they were originally learned dynamically) I expect that dynamic > > > inverse arp to be disabled, and there will be no dynamic entries on the > > > spokes for the same protocol and the same dlci. > > > > > > This is not the case in my lab here is the relevant part of the > config > > > on one spoke, and the results of 'show frame-relay map' > > > > > > interface Serial1 > > > ip address 192.168.14.2 255.255.255.0 > > > encapsulation frame-relay > > > frame-relay map ip 192.168.14.3 201 > > > frame-relay map ip 192.168.14.4 201 > > > no frame-relay inverse-arp > > > > > > Router2#sho frame-relay map > > > Serial1 (up): ip 192.168.14.1 dlci 201(0xC9,0x3090), dynamic, > > > broadcast,, status defined, active > > > Serial1 (up): ip 192.168.14.3 dlci 201(0xC9,0x3090), static, > > > CISCO, status defined, active > > > Serial1 (up): ip 192.168.14.4 dlci 201(0xC9,0x3090), static, > > > CISCO, status defined, active > > > > > > Can someone explain why this is happening? (also explain how disabling > > > frame-realy inverse arp works since I get similar results). > > > > > > Thanks > > > Ed > > > > > > Edward Moss, CCNP, CCDP > > > > > > > > > > > > > > > _ > > > FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > > _ > > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
