BGP Route Advertisment
Route Advertisement Issues
| Key Point | Further Details |
|---|---|
| Prefixes Not Being Advertised | Ensure that network statements are correctly configured or that redistribution is properly set up. |
| Route Filtering | Check for any outbound or inbound route filters that may be preventing the advertisement or receipt of routes. |
| Incorrect Route Aggregation | Verify that route aggregation is correctly configured to avoid missing more specific routes. |
Palo Alto Commands
| Command | Explanation |
|---|---|
show routing protocol bgp loc-rib | Shows the local BGP routing table to verify advertised and received prefixes. |
show routing route network <prefix> | Verifies if specific prefixes are being advertised in the routing table. |
show routing protocol bgp policy | Displays BGP policies to check for route filters affecting advertisement. |
show routing protocol bgp aggregate | Checks the configuration of route aggregation. |
Cisco ASA Commands
| Command | Explanation |
|---|---|
show ip bgp | Displays the BGP table to check advertised and received routes. |
show ip bgp summary | Summarizes BGP session information, useful to see if prefixes are being sent. |
show route-map | Displays route-maps applied to BGP, useful for investigating filtering issues. |
show ip bgp aggregate-address | Verifies the configuration of BGP route aggregation. |
Fortinet Commands
| Command | Explanation |
|---|---|
get router info bgp network | Displays the BGP advertised routes. |
diagnose router bgp routes export check | Checks if specific routes are being exported (advertised) correctly. |
get router info bgp filters | Lists the active BGP filters that could affect route advertisement. |
get router info bgp aggregate | Shows configured BGP aggregation to check for correctness. |
Check Point Gaia Commands
| Command | Explanation |
|---|---|
show bgp routes all | Displays all routes in the BGP table, including advertised and received. |
show route redistribution | Displays route redistribution configuration which might affect BGP advertisement. |
show bgp policy | (Assuming hypothetical command) To review policies that might filter advertised routes. |
show bgp aggregate-address | (Assuming hypothetical command) To check BGP route aggregation settings. |
Debian Commands
| Command | Explanation |
|---|---|
vtysh -c 'show ip bgp' | Shows the BGP table for advertised and received routes. |
vtysh -c 'show ip bgp summary' | Provides a summary of BGP sessions, useful for checking if routes are advertised. |
| `vtysh -c ‘show run | section bgp’` |
vtysh -c 'show ip bgp aggregate-address' | Checks for BGP route aggregation configurations. |
Advanced Route Advertisement Verifications
| Key Point | Further Details |
|---|---|
| Outbound Route Maps | Confirm that outbound route maps are correctly applied to manipulate path attributes. |
| Maximum Prefix Limits | Check if maximum prefix limits are set too low, potentially blocking route advertisements. |
Palo Alto Commands
| Command | Explanation |
|---|---|
show routing protocol bgp policy | Displays the applied route map policies for BGP. |
show routing protocol bgp max-prefix | Shows the maximum prefix limits for BGP sessions. |
show routing protocol bgp policy statistics | Provides statistics on route map applications, useful for verifying the effectiveness of outbound route maps. |
show routing protocol bgp config | Displays the complete BGP configuration, including any route map or max prefix configurations. |
Cisco ASA Commands
| Command | Explanation |
|---|---|
show route-map | Displays route maps configured on the device. |
show ip bgp summary | Shows the BGP summary including maximum prefix limits. |
show ip bgp neighbors <neighbor-ip> advertised-routes | Shows routes being advertised to a specific neighbor, useful for verifying route map impact. |
show ip bgp policy | Displays the policies applied to BGP, including any filtering and modifications due to route maps. |
Fortinet Commands
| Command | Explanation |
|---|---|
get router info bgp filters | Displays the filters applied to BGP routes, which can include route maps. |
diagnose router bgp summary | Provides BGP summary information, including max prefix counts. |
diagnose router bgp routes export check | Verifies which routes are being exported according to current filter and route map settings. |
get router info bgp neighbors <neighbor-ip> advertised-routes | Checks routes advertised to a specific neighbor, useful for route map verification. |
Check Point Gaia Commands
| Command | Explanation |
|---|---|
show bgp policy | (Assuming hypothetical command) Shows BGP policy settings, including route maps. |
show bgp summary | Displays BGP summary, useful for checking maximum prefix limits. |
show bgp config | (Assuming hypothetical command) Displays the detailed BGP configuration, including route maps and prefix limits. |
show bgp routes by-policy <policy-name> | (Assuming hypothetical command) Filters routes by applied policy, useful for verifying route map effects. |
Debian Commands
| Command | Explanation |
|---|---|
vtysh -c 'show route-map' | Displays route maps used in BGP on Quagga/Zebra. |
vtysh -c 'show ip bgp summary' | Shows BGP session summaries, including max prefix info. |
vtysh -c 'show ip bgp neighbors <neighbor-ip> advertised-routes' | Views routes advertised to a specific neighbor, useful for checking route map applications. |
vtysh -c 'show ip bgp policy' | (Assuming hypothetical command) Displays BGP policies including route maps and filtering. |